Zero-Trust Security Architecture 2026

// eBPF program (XDP) attached to Redis port
SEC("xdp")
int jti_revocation_check(struct xdp_md *ctx) {
    // 1. Parse Redis protocol (inline, no copy)
    void *data = (void *)(long)ctx->data;
    void *data_end = (void *)(long)ctx->data_end;
    
    // 2. Extract JTI from GET/EXISTS command
    char *jti = parse_redis_key(data, data_end);
    if (!jti) return XDP_PASS;
    
    // 3. Lookup in BPF map (LRU hash, 1M entries)
    bool *valid = bpf_map_lookup_elem(&jti_revocation_map, jti);
    
    // 4. Decision
    if (valid && *valid) {
        // Valid → forward to Redis
        return XDP_PASS;
    } else {
        // Revoked → synthetic Redis response "0"
        return xdp_respond_revoked(ctx);
    }
}