Equivalences of Vigenere Systems. - Joel V. Brawley; Jack Levine (Cryptologia, 1977)

Some Cryptographic Applications of Permutation Polynomials. - Jack Levine; Joel V. Brawley (Cryptologia, 1977)

The Two-Message Problem in Cipher Text Autokey. Part I. - Jack Levine; Michael Willet (Cryptologia, 1979)

The Two-Message Problem in Cipher Text Autokey. Part II. - Jack Levine; Michael Willet (Cryptologia, 1979)

Applications of the Drazin Inverse to the Hill Cryptographic System. Part I. - Jack Levine; Robert E. Hartwig (Cryptologia, 1980)

Applications of the Drazin Inverse to the Hill Cryptographic System. Part II. - Jack Levine; Robert E. Hartwig (Cryptologia, 1980)

Applications of the Drazin Inverse to the Hill Cryptographic System. Part IV. - Robert E. Hartwig; Jack Levine (Cryptologia, 1981)

Applications of the Drazin Inverse to the Hill Cryptographic System. Part III. - Robert E. Hartwig; Jack Levine (Cryptologia, 1981)

Corrections for Published Copy of United States Cryptographic patents: 1861-1981. - Jack Levine (Cryptologia, 1984)

Some Further Cryptographic Applications of Permutation Polynomials. - Jack Levine; Richard Chandler (Cryptologia, 1987)

The Hill Cryptographic System with Unknown Cipher Alphabet but Known Plaintext. - Jack Levine; Richard Chandler (Cryptologia, 1989)