[1] He also improved the quantum Fourier transform discovered by Peter Shor in the same year (1994).
[2] He has also worked on algorithms for computing discrete logarithms, the cryptanalysis of RSA, methods for rapid matrix multiplication (see Coppersmith–Winograd algorithm) and IBM's MARS cipher.
[3] In 1998, he started Ponder This, an online monthly column on mathematical puzzles and problems.
[4] Around that same time, he left IBM and began working at the IDA Center for Communications Research, Princeton.
[6][7] In 2022, Coppersmith was awarded the Levchin Prize for “foundational innovations in cryptanalysis”[8] .