$ cat writeup.md…
$ cat writeup.md…
compfest2026
Task: recover a message encrypted as m^e in Z/NZ[x]/(x^10-2), with e generated from a small complementary private parameter. Solution: use continued fractions on e/(N^10-2N^5+1) to recover p and q, then decrypt with the true ring exponent derived from factoring x^10-2 modulo both primes.
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