Inshall'hack
Security if God wills it
Inshall'hack
Production debugging note (SigSegv1 CTF)

Production debugging is one of the two tasks I submitted for the SigSegv1 CTF. Though the challenge was beta-tested (and judged to be of sufficient quality by the testers), it apparently elicited significant backlash among the players of the CTF. It ended up being flagged only once, by train whose …

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Paddinganography: hiding data in baseN-encoded strings

Context A couple of weeks ago, I discovered a steganography technique based on the padding of base64-encoded strings. The reasoning behind it goes as follows: when encoding a message using base64, each of the base64 characters represents 6 bits (as 26 = 64 possible values can be encoded on 6 …

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