An algorithm for efficient detection of (N, N)-splittings and its application to the isogeny problem in dimension 2. - Maria Corte-Real Santos; Craig Costello; Sam Frengley (IACR Cryptol. ePrint Arch., 2022)

Congruences of elliptic curves arising from nonsurjective mod 𝑁 Galois representations. - Sam Frengley (Math. Comput., 2022)

Efficient algorithms for the detection of (N,N)-splittings and endomorphisms. - Maria Corte-Real Santos; Craig Costello; Sam Frengley (IACR Cryptol. ePrint Arch., 2025)