This is the solution of the challenge “winter” from Dice CTF. Winternitz signature allowing to forge a signature from a previous valid signature.

This is the solution of the challenge “Chaos Theory” from ZK Hack IV . Thanks to pairing bilinearity, it was possibile to identify a message encrypted with a variant of ElGamal encryption over bls12-381 curves.

This is the solution of the challenge “Supervillain” from ZK Hack IV . It was possible to forge a Proof of Possession of a private key used in BLS signature thanks to the linearity of the scheme.

This is the solution of the challenge “Gamma Ray” from ZK Hack IV . It was possible to forge a nullifier of a circuit using the negation of a valid nullifier on a Miyaji-Nakabayashi-Takano curve.

This is the solution of the challenge “Upside-down Cake” from Potluck CTF. It was an modular equation solved after transformation by the Coppersmith method applied to bivariate polynomials.

This is the solution of the challenge “Light weight but heavy duty” from Ph0wn 2023 CTF we solved together with @FdLSifu. It was a ARM reverse engineering of the block cipher PRESENT.