j4cbo's confound

This is a small but deeply twisted keygenme. It was written in a mix of two very unusual programming languages and compiled with my own custom compiler and runtime. Windows PE and Linux ELF binaries are included.

confound, confound.exe - easy mode.
confound2, confound2.exe - if you think you're pro.

Both versions implement exactly the same algorithm and are compiled from the same source code. Some extra optimization passes were used on the first version; see if you can do without.

A valid solution is a concise description of the criteria this binary uses to recognize strings. You should be able to fully describe the requisite conditions in less than twenty words.

Difficulty: 5 - Professional problem to solve
Platform: Multiplatform
Language: Unspecified/other

Published: 16. Jul, 2010
Downloads: 174