$ cat writeup.md…
$ cat writeup.md…
cryptohack
Task: LWE-like encryption using numpy uint16 (mod 2^16) with noise 2*e. Public key and ciphertexts given. Solution: since noise is even, reduce everything mod 2 to cancel noise; solve linear system over GF(2) to recover secret key mod 2; decrypt each ciphertext bit using LSB only.
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