Jeff Schiller
The MIT network manager who made PGP legally downloadable in the US and spent a decade as the IETF's top security official.
Schiller built and ran MIT's campus network from the 1980s and worked close to Project Athena, where Kerberos was born. He became known off campus in 1994, while Phil Zimmermann was under investigation and PGP's use of RSA infringed a patent. Schiller brokered MIT PGP 2.6, built on RSA's own licensed RSAREF code, and put it on MIT's servers. Suddenly there was a version neither the patent holder nor the prosecutors could object to.
As IETF Security Area Director from 1994 to 2003 he pushed the line that every new protocol needs a security considerations section, and that deliberate wiretap back doors do not belong in internet standards. It sounds obvious now. During the crypto wars it was not.