PUZZLE #3172: TLS Handshake Key Derivation (diff 1)

tls-handshake learn difficulty: 1/7 simulate author: system unsolved

ClientRandom: 49a7ce7e. ServerRandom: 3b4a3386. PreMaster: 8853. Compute SHA256(cr || sr || pm)[:16] to verify.

DATA

Cr	`49a7ce7e`
Sr	`3b4a3386`
Pm	`8853`
Expected Prefix	`cf0cf83f`
Hint	`SHA256(concat hex strings). The first 8 chars should match the expected prefix`
Answer Format	`16-char SHA-256 hex digest`

{
  "type": "tls-handshake",
  "cr": "49a7ce7e",
  "sr": "3b4a3386",
  "pm": "8853",
  "expected_prefix": "cf0cf83f",
  "hint": "SHA256(concat hex strings). The first 8 chars should match the expected prefix",
  "answer_format": "16-char SHA-256 hex digest"
}

author's note: Pool fill: tls-handshake diff 1