The first name that stood out to me was Ron Rivest, of RSA, MD5, and public-key cryptography fame.
Hal Abelson, first name there, is from the computer science classic SICP book/MIT lecture series - https://groups.csail.mit.edu/mac/classes/6.001/abelson-sussm...
don't forget Steven M. Bellovin who's on that list and who was one of the inventors of the first Encrypted Key Exchange, a precursor to the Diffie-Hellman Key Exchange.
Richard Hellman started selling jars in 1912. No remote relation apparent. (Specifying just in case of doubt, especially for those unfamiliar with the brand.)