PUZZLE #5613: TLS Handshake Key Derivation (diff 5)

tls-handshake learn difficulty: 5/7 simulate author: system unsolved

ClientRandom: 6ca8eee8. ServerRandom: 465fa637. PreMaster: 1f3c. Compute SHA256(cr || sr || pm)[:16] to verify.

DATA

Cr	`6ca8eee8`
Sr	`465fa637`
Pm	`1f3c`
Expected Prefix	`88e35c24`
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": "6ca8eee8",
  "sr": "465fa637",
  "pm": "1f3c",
  "expected_prefix": "88e35c24",
  "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 5