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Is argon2 secure?
Argon2 is a cryptographic hash algorithm specifically designed to secure passwords. It is recommended by OWASP in the Argon2id variant as a modern, secure and flexible algorithm.
Is hashing done client side?
A pretty uncommon, but really good practice, is the client-side hashing. It is supposed act as another layer of security, hiding the password from the server. The idea is that the client-side should hash (e.g. scrypt ) the password before sending it to the server.
Is argon2 a KDF?
Argon2 is a key derivation function that was selected as the winner of the Password Hashing Competition in July 2015. Argon2i is optimized to resist side-channel attacks. It accesses the memory array in a password independent order. Argon2id is a hybrid version.
What is the purpose of a salt when hashing and storing passwords?
A cryptographic salt is made up of random bits added to each password instance before its hashing. Salts create unique passwords even in the instance of two users choosing the same passwords. Salts help us mitigate hash table attacks by forcing attackers to re-compute them using the salts for each user.
Does Argon2 need salt?
The generated keys are very strong, 64 pRNG hex characters. Right now we just use an empty string as the salting parameter in argon2 since we figure salt is not even needed since our passwords themselves are not prone to a dictionary attack.
How long is an 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 .
Is there something better than bcrypt?
SCrypt is a better choice today: better design than BCrypt (especially in regards to memory hardness) and has been in the field for 10 years. On the other hand, it has been used for many cryptocurrencies and we have a few hardware (both FPGA and ASIC) implementation of it.
How is the Argon2 algorithm used to hash passwords?
In Argon2, we can configure the length of the salt, the length of the generated hash, iterations, memory cost, and CPU cost to control the resources that are needed to hash a password. The Argon2 algorithm has three variants:
How to use Argon2 in a.NET application?
For background information, see the following posts: If you want to use Argon2 in a .NET application, the Argon2 documentation recommends the Konscious.Security.Cryptography library. This library is incredibly simple to consume from a .NET application.
Which is the best library to use for Argon2?
If you want to use Argon2 in a .NET application, the Argon2 documentation recommends the Konscious.Security.Cryptography library. This library is incredibly simple to consume from a .NET application. Further, it offers all of the flexibility that we need in order to tune Argon2 to our environment.
Which is the reference C implementation of Argon2?
Failed to load latest commit information. This is the reference C implementation of Argon2, the password-hashing function that won the Password Hashing Competition (PHC).