$ cat writeup.md…
$ cat writeup.md…
volgactf
Task: Custom Kyber-like Module-LWE encryption with N=80, K=2, q=3329; public key matrix A has a zero sub-block making it triangular. Solution: exploit triangular structure to decompose into independent Ring-LWE instances, solve each via BKZ lattice reduction + Babai CVP, recover encryption randomness, then decrypt.
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