====== Namespace WvdS.System.Security.Cryptography.KeyDerivation ======

Contiene classi per la derivazione delle chiavi (KDF) con supporto PQ.

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===== Classi =====

^  Classe  ^  Descrizione  ^
| [[.:keyderivationextensions|KeyDerivationExtensions]] | Funzioni KDF (HKDF, PBKDF2, Argon2id) |
| [[.:hybridkeymaterial|HybridKeyMaterial]] | Container per chiavi derivate |
| [[.:tlskeymaterial|TlsKeyMaterial]] | Materiale chiavi stile TLS |
| [[.:tls13keyschedule|Tls13KeySchedule]] | Key Schedule TLS 1.3 |

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===== KDF supportate =====

^  Funzione  ^  Standard  ^  Utilizzo  ^
| HKDF | RFC 5869((RFC 5869: https://datatracker.ietf.org/doc/html/rfc5869)) | Chiavi di sessione da Shared Secret |
| PBKDF2 | RFC 8018((RFC 8018: https://datatracker.ietf.org/doc/html/rfc8018)) | Chiavi basate su password |
| Argon2id | RFC 9106((RFC 9106: https://datatracker.ietf.org/doc/html/rfc9106)) | KDF memory-hard |

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===== Esempio =====

<code csharp>
using WvdS.System.Security.Cryptography.KeyDerivation;

byte[] sharedSecret = /* da ML-KEM */;
byte[] salt = RandomNumberGenerator.GetBytes(32);

// HKDF per chiavi di sessione
byte[] aesKey = KeyDerivationExtensions.DeriveKey(
    sharedSecret,
    outputLength: 32,
    salt: salt,
    info: Encoding.UTF8.GetBytes("AES-256-GCM"));

// Derivazione chiavi ibrida
byte[] hybridKey = KeyDerivationExtensions.DeriveHybridKey(
    classicSecret: ecdhSecret,
    pqSecret: mlKemSecret,
    outputLength: 32);
</code>

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===== Vedi anche =====

  * [[..:keyexchange:start|Namespace KeyExchange]]
  * [[..:encryption:start|Namespace Encryption]]
  * [[..:..:..:start|Panoramica API]]

{{tag>namespace kdf hkdf pbkdf2 argon2id}}

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//Wolfgang van der Stille @ EMSR DATA d.o.o. - Post-Quantum Cryptography Professional//