PUZZLE #3342: TLS Handshake Key Derivation (diff 7)

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

ClientRandom: 09f7a6f3. ServerRandom: 429935e6. PreMaster: cf66. Compute SHA256(cr || sr || pm)[:16] to verify.

DATA

Cr	`09f7a6f3`
Sr	`429935e6`
Pm	`cf66`
Expected Prefix	`68819006`
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": "09f7a6f3",
  "sr": "429935e6",
  "pm": "cf66",
  "expected_prefix": "68819006",
  "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 7