Len is a co-creator of the RSA encryption algorithm [1] and received the 2002 Turing Award (often defined as the Nobel Prize of Computer Science). The RSA paper is one of the most significant computer science papers ever published and has received over 25,695 citations. Len is also known for the creation of DNA computing. He is a professor at the University of Southern California and a member of the National Academy of Sciences.

[1] Rivest, R. L., Shamir, A., & Adleman, L. (1978). A method for obtaining digital signatures and public-key cryptosystems. Communications of the ACM, 21(2), 120-126.