An extended cryptographic key generation scheme for multilevel data security. - Lein Harn; Yaw-Ruey Chien; Thomas Kiesler (ACSAC, 1989)

Two new efficient cryptosystems based on Rabin's scheme: alternatives to RSA cryptosystem. - Lein Harn; Thomas Kiesler (ACSAC, 1989)

Authenticated Group Key Distribution Scheme for a Large Distributed Network. - Lein Harn; Thomas Kiesler (S&P, 1989)

An Efficient Probabilistic Encryption Scheme. - Lein Harn; Thomas Kiesler (Inf. Process. Lett., 1990)