Old crypto papers:

Size Description
pdf, 7 pp, 228 K Cryptography in an Algebraic Alphabet, Lester S. Hill, 1929
pdf, 20 pp, 788 K Concerning Certain Linear Transformation Apparatus of Cryptography, Lester S. Hill, 1931
pdf, 10 pp, 235 K Variable Matrix Substitution in Algebraic Cryptography, Jack Levine, 1958
pdf, 4 pp, 199 K Some Further Methods in Algebraic Cryptography, Jack Levine, 1958
pdf, 8 pp, 280 K Some Elementary Cryptanalysis of Algebraic Cryptography, Jack Levine, 1961
pdf, 7 pp, 257 K Some Applications of High-Speed Computers to the case n = 2 of Algebraic Cryptography, Jack Levine, 1961
pdf, 79 pp, 2.6 M A Mathematical Theory of Communications, C. E. Shannon, 1948
pdf, 60 pp, 2.3 M Communications Theory of Secrecy Systems, C. E. Shannon, 1949