Secret Key — timing lessonCTF board
Misc · Crate-CTF adaptation

Secret Key — timing lesson

Study the timing transcript and identify why character-by-character comparisons can disclose secret prefixes.

TIMING TRANSCRIPT prefix length 0: 101 cycles prefix length 1: 108 cycles prefix length 2: 117 cycles lesson: comparison time changes with the matching secret prefix

Attribution: Adapted from Crate-CTF, 2025 challenge “Secret Key” by Erik. Used under the MIT License; flags and secrets were replaced for GisVuln. See source and license details.

This GisVuln adaptation is self-contained and does not contact the original challenge infrastructure.