Argon2d

Argon2d is a key derivation function and password hashing scheme. It was the winner of the Password Hashing Competition in 2015. Argon2d is designed to be resistant to various types of attacks, including brute-force attacks, parallel attacks, and side-channel attacks.

The function has three main parameters: memory cost, time cost, and parallelism. These parameters control how much memory and how many computational resources are required to compute a hash. By increasing these costs, the difficulty of cracking a password increases, making it more secure. The 'd' in Argon2d stands for 'data-dependent', meaning that the memory access pattern is data-dependent, which makes it more resistant to GPU-based attacks compared to its counterpart, Argon2i.

Argon2d's primary goal is to make it computationally expensive and time-consuming for attackers to guess passwords, even if they have access to significant hardware resources. It achieves this by requiring a large amount of memory and performing a significant number of operations. This makes it a strong choice for securing sensitive data like user passwords in applications. Its design prioritizes security and resistance to modern hardware acceleration techniques used by attackers.