Sfd Token Generator !new! Access

| Operation | Time (ms) | Throughput (tokens/sec) | |-----------|-----------|--------------------------| | Generate 1 token | 0.24 | 4,166 | | Generate batch of 1000 | 186 | 5,376 | | Verify token (local) | 0.18 | 5,555 | | Verify + state check | 0.31 | 3,225 | | Blind sign (Chaum) | 1.2 | 833 |

// ---- Configuration ------------------------------------------------- const HMAC_SECRET = process.env.SFD_HMAC_SECRET; // 256‑bit base64 const TOKEN_TTL = 300; // seconds (5 min) const NONCE_SIZE = 12; // bytes // -------------------------------------------------------------------- sfd token generator

| Part | Content | Example fields | |------|---------|----------------| | | Algorithm identifier, token type | "alg":"HS256", "typ":"SFD" | | Payload | Claims that describe the request | "sub":"client‑123", "obj":"bucket1/file.pdf", "op":"PUT", "exp":1712768400, "nonce":"a1b2c3" | | Signature | HMAC‑SHA256 (or RSA‑PSS/ECDSA) over Header.Payload using a secret key known only to the generator and verifier. | v6Qh5... | | Operation | Time (ms) | Throughput (tokens/sec)