Argon2 (RFC 9106)

1. Argon2 algorithm overview

   Inputs, operation, indexing and the compression function.

2. Argon2 inputs and outputs

   Password, salt, parallelism, memory, passes and tag length.

3. Indexing: Argon2d, Argon2i and Argon2id

   Argon2d, Argon2i and Argon2id indexing modes.

4. Parameter choice

   Selecting memory, time and parallelism parameters.

5. Security considerations

   Attacks and trade-offs.

6. Argon2id guidance (OWASP)

   Recommended Argon2id minimum configuration.

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