Jill Catherine Pipher (born December 14, 1955, in Harrisburg, Pennsylvania) is an American mathematician.
She has published more than 60 research articles and has coauthored with Jeffrey Hoffstein and Joseph Silverman a textbook titled An Introduction to Mathematical Cryptography.
[4] She taught at the University of Chicago (1985–1990) before taking a position at Brown in 1990, where she served as chair of the Mathematics Department from 2005 to 2008.
In 1996, Pipher, along with Jeffrey Hoffstein, Daniel Lieman and Joseph Silverman, founded NTRU Cryptosystems, Inc., now part of Security Innovation, Inc. to market their cryptographic algorithms, NTRUEncrypt and NTRUSign.
[6] In 2019 she was named a SIAM Fellow "for her profound contributions in analysis and partial differential equations, groundbreaking work in public key cryptography, and outstanding scientific leadership".