WvdS.System.Security.Cryptography.KeyExchange Namespace

Enthält Klassen für Post-Quantum-Schlüsselaustausch mit ML-KEM.

Client                              Server
  │                                    │
  ├─ GenerateClientKeysAsync()         │
  │                                    │
  ├─ CreateInitRequest() ──────────────►│
  │   (ML-KEM PubKey + ML-DSA Sig)     │
  │                                    ├─ ProcessClientRequest()
  │                                    │   (Verify, Encapsulate)
  │◄────────────────── InitResponse ───┤
  │   (Ciphertext + ML-DSA Sig)        │
  │                                    │
  ├─ ProcessServerResponse()           │
  │   (Verify, Decapsulate)            │
  │                                    │
  ├─ CreateConfirmRequest() ───────────►│
  │   (HMAC Confirmation)              │
  │                                    ├─ VerifyConfirmation()
  │◄──────────────── ConfirmResponse ──┤
  │                                    │
  ▼                                    ▼
  SecureSession                   SecureSession
  (Shared Secret)                 (Shared Secret)

using WvdS.System.Security.Cryptography.KeyExchange;
 
var kex = new KeyExchangeService();
 
// === Client ===
var clientKeys = await kex.GenerateClientKeysAsync();
var initRequest = await kex.CreateInitRequestAsync(clientKeys);
 
// Sende initRequest an Server...
 
// === Server ===
var serverKeys = await kex.GenerateServerKeysAsync();
var (response, serverSession) = await kex.ProcessClientRequestAsync(
    initRequest, serverKeys);
 
// Sende response an Client...
 
// === Client ===
var clientSession = await kex.ProcessServerResponseAsync(
    response, clientKeys);
 
// Beide haben nun identisches Shared Secret!

• Encryption Namespace
• KeyDerivation Namespace
• API-Übersicht

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