Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. As I had proposed above, please send those two hash values to Bitwarden’s tech support, and ask them to validate these against the hash stored in their database for your account (they would have to run the server-side iterations first, but I assume they will be aware of that). For scrypt there are audited, and fuzzed libraries such as noble-hashes. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. 1 was failing on the desktop. The cryptographic library used, is BouncyCastle, the same one Bitwarden already uses on Android for other cryptographic functions. Therefore, a. Palant said this flaw meant that the security level of Bitwarden is identical to what LastPass had. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. 12. ddejohn: but on logging in again in Chrome. Passwords are chosen by the end users. Higher KDF iterations can help protect your master password from being brute forced by an attacker. For comparison KDF iterations: 4 KDF memory (MB): 256 Concurrency KDF: 4 takes about 5 seconds. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Scroll further down the page till you see Password Iterations. Going to see if support can at least tell me when my password was last changed (to rule out a very implausible theory), and at the very least see if it’s possible for them to roll my vault back to my old password,. If your passphrase has fewer than 6 words, then the password entropy and KDF work together to secure your vault. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. It has also changed the minimum count to 100,000, which is actually low considering the recommendation from OWASP. This article describes how to unlock Bitwarden with biometrics and. RE: Increasing KDF Iterations… Are there any inherent problems caused by increasing KDF iterations? That is, any risk of losing data, etc. Security. 1 Like mgibson (Matt Gibson) January 4, 2023, 4:57pm 6 It is indeed condition 2. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. If I end up using argon2 would that be safer than PBKDF2 that is. All of this assumes that your KDF iterations setting is set to the default 100,000. iOS limits app memory for autofill. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. (and answer) is fairly old, but BitWarden. Among other. 12. The point of argon2 is to make low entropy master passwords hard to crack. I don’t think this replaces an. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. In the thread that you linked, the issue was that OP was running third-party server software that is not a Bitwarden product, and attempting to use a Bitwarden client app to log in to their self-hosted server that was running incompatible software. Exploring applying this as the minimum KDF to all users. Quexten (Bernd Schoolmann) January 20, 2023, 6:59am 20. This strengthens vault encryption against hackers armed with increasingly powerful devices. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Since I don't expect that Bitwarden needs to frequently add new KDF's with new parameters, this pull request simply adds 2 integer columns for the memory consumption, and the parallelism of the KDFs. I have done so with some consternation because I am sensitive to the security recommendation inherent in the warning message. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Remember FF 2022. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. anjhdtr January 14, 2023, 12:03am 12. Click on the box, and change the value to 600000. The point of argon2 is to make low entropy master passwords hard to crack. I have created basic scrypt support for Bitwarden. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Higher KDF iterations can help protect your master password from being brute forced by an attacker. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. higher kdf iterations make it harder to brute force your password. ## Code changes - manifestv3. Okay. Among other. We recommend a value of 600,000 or more. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. Then edit Line 481 of the HTML file — change the third argument. AFAIK KDF iterations count only affects vault unlock speed, not the navigation inside the vault once it's unlocked. )This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. 4. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. If you want to avoid feelings of inadequacy when Bitwarden ups the default iterations to 600,000 in a month or two, you can go ahead and increase your KDF iteration value to 600k. 3 KB. Ask the Community Password Manager. OK fine. Low KDF alert: A new alert will appear in the web app when a user's KDF iterations are lower than industry recommendations, currently 600,000 iterations. However, you can still manually increase your own iterations now up to 2M. New Bitwarden accounts will use 600,000 KDF iterations for. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Bitwarden Community Forums Master pass stopped working after increasing KDF. Vaultwarden works! More data, on the desktop I downgraded the extension for FF to 2022. 995×807 77. Bitwarden 2023. I didn’t realize it was available as I had been looking in the extension and desktop apps, not realizing a different option existed in the web vault. Among other. After being prompted for and using my yubikey, the vault immediately signed out (didn’t get any sort of confirmation). For scrypt there are audited, and fuzzed libraries such as noble-hashes. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. We recommend a value of 600,000 or more. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Unless there is a threat model under which this could actually be used to break any part of the security. This article describes how to unlock Bitwarden with biometrics and. all new threads here are locked, but replies will still function for the time being. The point of argon2 is to make low entropy master passwords hard to crack. Keep in mind having a strong master password and 2FA is still the most important security aspect than adding additional bits of. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. 1. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. trparky January 24, 2023, 4:12pm 22. Theoretically, key rotation is the most dangerous because the vault has to be entirely re-encrypted, unlike the other operations of which the encryption key has to be re. I don’t think this replaces an. If you don’t have a locked vault on your device and you are logging in, then there is an unauthentication prelogin in which fetches the number of KDF iterations from the server, that part is true. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Please keep in mind that for proper cracking rigs with a lot more GPU power the difference between PBKDF2 cracking and Argon2 cracking will be even greater!The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. It has to be a power of 2, and thus I made the user configurable work factor a drop down selection. 9,603. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. kwe (Kent England) January 11, 2023, 4:54pm 1. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Feel free to resume discussion on Github: Discussions · bitwarden/server · GitHub Discussions · bitwarden/clients · GitHub Discussions · bitwarden/mobile · GitHubI think the . This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Existing accounts can manually increase this. Also, check out this Help article on Low KDF Iterations: and the KDF Iteration FAQ:. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. In this case, we recommend to use a relatively low value for the Argon2 memory parameter (64 MB or less, depending on the app and the database size) and a relatively high number of iterations. On a sidenote, the Bitwarden 2023. Also, to cover all the bases, are you sure that what you were using every day to unlock your vault. 8 Likes. Exploring applying this as the minimum KDF to all users. The user probably wouldn’t even notice. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change your master password or KDF iterations, if Bitwarden resets their servers, etc. Hit the Show Advanced Settings button. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Search for keyHash and save the value somewhere, in case the . Iterations (i) = . I think the . Feb 4, 2023. According to comments posted by Quexten at Bitwarden's community forums, the company has a 5-week release cycle, so we could expect Argon2 support to be added next month on all platforms if the tests are successful. No adverse effect at all. For algorithm, I choose PBKDF2 SHA-256 and set my iterations to 500,000. 12. Therefore, a. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) =. alfonsojon (Jonathan Alfonso) May 4, 2023, 2:46pm 1. Among other. Bitwarden Community Forums Argon2 KDF Support. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Among other. The user probably wouldn’t even notice. KeePassium has suggested 32 MiB as a limit for Argon2 on iOS, but I think that Bitwarden’s default setting of 64 MiB should be OK (since they did do some testing before the release, which presumably included some iOS devices). 2 Likes. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Question about KDF Iterations. For other KDFs like argon2 this is definitely. Therefore, a. Looking through the psql schema under the users table, there are 2 columns: password_iterations and client_kdf_iterations. Unless there is a threat model under which this could actually be used to break any part of the security. Navigate to the Security > Keys tab. Unless there is a threat model under which this could actually be used to break any part of the security. The user probably wouldn’t even notice. Unless there is a threat model under which this could actually be used to break any part of the security. In this case, we recommend to use a relatively low value for the Argon2 memory parameter (64 MB or less, depending on the app and the database size) and a relatively high number of iterations. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. 2 Likes. Under “Security”. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Exploring applying this as the minimum KDF to all users. Go to “Account settings”. #1. Now it works! Seems to be a bug between the BitWarden extension and a Vault that has 100000 KDF iterations. Unless there is a threat model under which this could actually be used to break. Click the update button, and LastPass will prompt you to enter your master password. 4. OK fine. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. I myself switched to using bitwarden_rs, which is compatible with the bitwarden clients. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Export your vault to create a backup. The user probably wouldn’t even notice. rs I noticed the default client KDF iterations is 5000:. In src/db/models/user. Changed my master password into a four random word passphrase. Now I know I know my username/password for the BitWarden. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. . The user probably. Any idea when this will go live?. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. There are many reasons errors can occur during login. Bitwarden has also recently added another KDF option called Argon2id, which defends against GPU-based and side-channel attacks by increasing the memory needed to guess a master password input. The user probably wouldn’t even notice. Yes and it’s the bitwarden extension client that is failing here. PBKDF2 600. 1. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. feature/argon2-kdf. Remember FF 2022. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. 3 KB. Exploring applying this as the minimum KDF to all users. Argon2 Bitwarden defaults - 16. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. 2FA was already enabled. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Bitwarden Community Forums. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. 2 or increase until 0. For scrypt we could get by, by setting the work factor N (which influences both computation and memory) and store this in the KDF Iterations (although ideally a user could configure the other parameters too). Increasing iterations from the default 64 MB may result in errors while unlocking the vault with autofill. 2877123795. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. 1 Like. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Mobile: The C implementation of argon2 was held up due to troubles building for iOS. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. Our default is 100,000 iterations, the Min allows for higher performance at the user's discretion but the key length combined with the password still makes this. Great additional feature for encrypted exports. 0. Navigate to the Security > Keys tab. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Regarding password protected exports, the key is generated through pbkdf2 and stretched using hkdf. One of the Hacker News commenters suggestions which sounds reasonable is to upgrade the user to the current default KDF iterations upon a change of the master password. If changing your iteration count triggers a re-encryption, then your encryption key is derived from your password. Vaultwarden works! More data, on the desktop I downgraded the extension for FF to 2022. Unless there is a threat model under which this could actually be used to break any part of the security. With the warning of ### WARNING. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Bitwarden also uses the PBKDF2 KDF, but as of this writing, with a more secure minimum of 600,000 iterations. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. 10. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Exploring applying this as the minimum KDF to all users. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Let's look back at the LastPass data breach. I think the . I’m writing this to warn against setting to large values. This article describes how to unlock Bitwarden with biometrics and. The user probably wouldn’t even notice. ”. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. The point of argon2 is to make low entropy master passwords hard to crack. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Exploring applying this as the minimum KDF to all users. 12. We recommend a value of 600,000 or more. 2 Likes. Bitwarden constantly looks at the landscape for the right combination of industry standard and emerging encryption technologies. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The user probably wouldn’t even notice. 2. It has to be a power of 2, and thus I made the user configurable work factor a drop down selection. Likewise, I'm not entirely sure which of the three WebAssembly buttons is most representative of how the Bitwarden client-side hashing algorithm will perform. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Unless there is a threat model under which this could actually be used to break any part of the security. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. The user probably wouldn’t even notice. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. 1. Therefore, a rogue server could send a reply for. On the cli, argon2 bindings are. One of the Hacker News commenters suggestions which sounds reasonable is to upgrade the user to the current default KDF iterations upon a change of the master password. Exploring applying this as the minimum KDF to all users. Therefore, I would recommend heeding Bitwarden's warnings about not exceeding 10 iterations. Password Manager. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. The point of argon2 is to make low entropy master passwords hard to crack. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Anyways, always increase memory first and iterations second as recommended in the argon2 paper and iterations only afterwards. I had never heard of increasing only in increments of 50k until this thread. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Bitwarden client applications (web, browser extension, desktop, and. The security feature is currently being tested by the company before it is released for users. I increased KDF from 100k to 600k and then did another big jump. Also notes in Mastodon thread they are working on Argon2 support. Bitwarden users have always had the option to specify the number of iterations for their account, and 600,000 is now the default value for new accounts. Changing my “KDF Iterations” in my Vault UI will change the value of client_kdf_iterations. log file somewhere safe). This is performed client side, so best thing to do is get everyone to sign off after completion. I think the . Exploring applying this as the minimum KDF to all users. What is your KDF iteration set to, in the bitwarden web vault settings? Reply diamondgoal. json file (storing the copy in any. Due to the recent news with LastPass I decided to update the KDF iterations. The user probably wouldn’t even notice. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. If your original password is 50 bits of entropy, each additional bit is (theoretically) double as costly to crack. Hey @Quexten we’re switching over to Github discussions to keep the PR chats closer to the code. Aug 17, 2014. I have created basic scrypt support for Bitwarden. 2 Likes. At our organization, we are set to use 100,000 KDF iterations. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. I went into my web vault and changed it to 1 million (simply added 0). The PBKDF2 algorithm can (in principle) be made slower by requiring that the calculation be repeated (by specifying a large number of KDF “iterations”). Shorten8345 February 16, 2023, 7:50pm 24. After changing that it logged me off everywhere. OK fine. This pull request changes the export and import to remove the hardcording, such that they work with different iteration counts and different KDF types. I think PBKDF2 will remain the default for audits and enterprise where FIPS-140 compliance is an expectation. log file gets wiped (in fact, save a copy of the entire . By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Check the kdfIterations value as well, which presumably will equal 100000. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. Now I know I know my username/password for the BitWarden. The current KDF, PBKDF2 uses little to no memory, and thus scales very well on GPUs which have a comparatively low amount o… Ok, as an update: I have now implemented scrypt for the mobile clients. At our organization, we are set to use 100,000 KDF iterations. On the typescript-based platforms, argon2-browser with WASM is used. Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. It has also changed. When you change the iteration count, you'll be logged out of all clients. Unless there is a threat model under which this could actually be used to break any part of the security. Can anybody maybe screenshot (if. If that is not insanely low compared to the default then wow. Remember FF 2022. With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Hi, I currently host Vaultwarden version 2022. Therefore, a rogue server could send a reply for. If a user has a device that does not work well with Argon2 they can use PBKDF2. (for a single 32 bit entropy password). 1. I logged in. 0 (5786) on Google Pixel 5 running Android 13. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. pub const CLIENT_KDF_ITER_DEFAULT: i32 = 5_000; Was wondering if there was a reason its set so low by default, and if it shouldn't be 100,000 like Bitwarden now uses for their default? Or possibly a configurable option like how PASSWORD_ITERATIONS is. Should your setting be too low, I recommend fixing it immediately. So if original entropy (of passphrase) with 2 iteration = +1 (effective) entropy. More specifically Argon2id. json file (storing the copy in any. alfonsojon (Jonathan Alfonso) May 4, 2023, 2:46pm 1. Regarding brute force difficulty, kdf_iterations is currently hard-coded to 100,000, which is the same default for a Bitwarden account and Bitwarden Send. 512 (MB) Second, increase until 0. The user probably wouldn’t even notice. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. I went into my web vault and changed it to 1 million (simply added 0). The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). See here. For now only memory is configurable, but in a future pull request me might introduce a kdfOptions object, to expose more configuration options (iterations, parallelism) to the user. (Goes for Luks too). Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The user probably wouldn’t even notice. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. LastPass uses the standard PBKDF2 (Password-Based Key Derivation Function 2). More specifically Argon2id. Unless there is a threat model under which this could actually be used to break any part of the security. Password Manager. Yes, you can increase time cost (iterations) here too. I have created basic scrypt support for Bitwarden. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. log file is updated only after a successful login. A question: For purposes of risk/benefit analysis, how does the hashing/encryption process differ from what is done in the regular encrypted export?With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Exploring applying this as the minimum KDF to all users. I went into my web vault and changed it to 1 million (simply added 0). The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. ), creating a persistent vault backup requires you to periodically create copies of the data. Argon2 (t=10, m=512MB, p=4) - 486. The client has to rely on the server to tell it the correct value, and as long as low settings like 5,000 iterations are supported this issue will remain. In this case, we recommend to use a relatively low value for the Argon2 memory parameter (64 MB or less, depending on the app and the database size) and a relatively high number of iterations. In contrast, Dmitry Chestnykh wrote a well-researched piece in 2020 (with an update in January 2023) that describes exactly how a brute-force attack against a stolen Bitwarden vault would be possible using only 100,000 PBKDF2 iterations (or the KDF iteration value set by the user) per password guess, and even proposed an improved authentication. For which i also just created a PR #3163, which will update the server-side to at least 350_000 iterations instead of 100_000. The user probably wouldn’t even notice. In the 2023. Yes and it’s the bitwarden extension client that is failing here. 12. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. The point of argon2 is to make low entropy master passwords hard to crack. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). So I go to log in and it says my password is incorrect. LastPass had (and still has) many issues, but one issue was allowing low iterations (1 or 500) on their KDF. With the warning of ### WARNING. Consider Argon2 but it might not help if your. The user probably wouldn’t even notice.