MD5 Collision Drill
crypto · easy · +30 XP
Target
POST /api/lab/md5-collision-101/submit body {a_hex, b_hex} (two hex blobs; must be different and have equal MD5)
Goal: submit two distinct inputs a and b (hex-encoded), a != b, where md5(a) == md5(b). Such collisions exist for MD5 — and we even provide a hint: the Marc Stevens / Wang & Yu 128-byte blocks are well-known. Search 'MD5 collision example' for ready-made pairs.
// AI hint · first is free · then 1 credit or 5 XP
// attack console
/api/lab/md5-collision-101/
// reuse on the cli
// submit flag
// no solves yet
3 of 17 · crypto