The USPTO granted Patent 6,298,137, 'Ring-based public key cryptosystem method,' listing Jill Pipher as co-inventor.
On October 2, 2001, the United States Patent and Trademark Office granted U.S. Patent 6,298,137, titled "Ring-based public key cryptosystem method," with Jill Pipher listed among the co-inventors. This patent covered foundational technology behind the NTRU cryptosystem, a lattice-based public-key encryption method that Pipher helped develop alongside colleagues Jeffrey Hoffstein and Joseph Silverman.
The NTRU cryptosystem represented a significant innovation in cryptography, offering an alternative to widely used systems like RSA, with faster computation and resistance to attacks from quantum computers—a property that has become increasingly important as quantum computing research has advanced. This work exemplifies how Pipher successfully bridged pure mathematical research in areas like number theory and harmonic analysis with practical, high-impact applications in computer security.
As a woman mathematician receiving a technology patent in cryptography, Pipher's achievement was notable both for its technical innovation and for demonstrating the value of interdisciplinary collaboration between pure mathematicians and applied cryptographers. The NTRU algorithm has since been studied and adopted in various security standards, and this patent stands as an early milestone in what would become a productive line of cryptographic invention for Pipher, who received two additional related patents in subsequent years.