ospab 8abffde0fd security: per-packet handshake masks (eliminates correlation fingerprint) ... Previously handshake obfuscation used a FIXED mask derived from HMAC(obf_key, u64::MAX). This meant bytes [4..6] (noise_len XOR fixed_mask) produced the SAME 2-byte value on every handshake from the same access key — a correlation fingerprint for DPI. Now BOTH data and handshake packets use the same payload-sampling approach: mask = HMAC-SHA256(obf_key, payload_sample[0..32]) For data packets: payload_sample = AEAD ciphertext (random per packet) For handshake packets: payload_sample = Noise ephemeral key (random per connection) Result: every single byte on the wire is cryptographically independent across packets. No fixed patterns, no correlation between connections. Wire analysis after this change: - Packet sizes: random (84-182 for handshake, variable for data) - All header bytes: unique per packet (XOR with unique HMAC mask) - Payload bytes: AEAD ciphertext / Noise handshake (indistinguishable from random) - No protocol signatures, no version fields, no magic bytes visible on wire		2026-05-17 15:20:21 +03:00
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src	security: per-packet handshake masks (eliminates correlation fingerprint)	2026-05-17 15:20:21 +03:00
Cargo.toml	perf: heavily tune UDP socket buffers via socket2 to support 10Gbps+ micro-burst resilience	2026-05-17 02:19:59 +03:00