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What is Argon2 used for?
Argon2d maximizes resistance to GPU cracking attacks. It accesses the memory array in a password dependent order, which reduces the possibility of time–memory trade-off (TMTO) attacks, but introduces possible side-channel attacks. Argon2i is optimized to resist side-channel attacks.
Is Argon2 secure?
Argon2 is modern ASIC-resistant and GPU-resistant secure key derivation function. It has better password cracking resistance (when configured correctly) than PBKDF2, Bcrypt and Scrypt (for similar configuration parameters for CPU and RAM usage).
What is Argon2 encryption?
Argon2 is cryptographic hashing algorithm, most recommended for password hashing. It is designed by Alex Biryukov, Daniel Dinu, and Dmitry Khovratovich from University of Luxembourg. Argon2 has 3 variants: Argon2d, Argon2i and Argon2id. Argon2i is optimized for password hashing.
Should I use Argon2?
In 2019 I’d recommend not to use PBKDF2 or BCrypt in the future and highly recommend Argon2 (preferrably Argon2id) for newer systems. Scrypt can be a second choice on systems where Argon2 is not available, but keep in mind that it has the same issues with respect to side-channel leakage.
How long is Argon2 hash?
32 bytes
The hash size is 32 bytes. The default parameters for the algorithm are a memory_cost of 1024 Kb (1 Mb), a time_cost of 2, and two threads to be used for parallelism. The Argon2 specifications suggest to use a power of 2 value for the memory_cost .
Should I use bcrypt or Argon2?
I’d recommend you to use Argon2 instead of bcrypt for storing password. It has won the Password Hashing Competition last year and is the recommended way to store passwords. Bcrypt is not bad but it could be used with insecure parameters while Argon2 does not have insecure parameters.
Does Argon2 need salt?
The salt is technically not required, but neither is Argon2, so yeah…
Should I use Argon2 or bcrypt?
How long is an Argon2 hash?
What hashing algorithm should I use?
Probably the one most commonly used is SHA-256, which the National Institute of Standards and Technology (NIST) recommends using instead of MD5 or SHA-1. The SHA-256 algorithm returns hash value of 256-bits, or 64 hexadecimal digits.
What is Argon2 salt?
Argon2 is a password hashing algorithm. It doesn’t (usually) require any secret. This is secure by design. It’s possible to use it with a secret value in addition to the password, which should almost never add any security. It’s also possible to use it as a key derivation function, which is almost always wasteful.