Reminiscences and Reflections of a Codebreaker	1
  Peter Hilton

FISH and I
W.	T. Tutte
Sturgeon, The FISH BP Never Really Caught	18
  Frode Weierud

ENIGMA and PURPLE: How the Allies Broke German and Japanese Codes During the War                                      
David A. Hatch
The Geheimschreiber Secret	62
  Lars Ulfving, Frode Weierud
The RSA Public Key Cryptosystem	101
  William P. Wardlaw

Number Theory and Cryptography (using Maple)	124 John Cos grave

A Talk on Quantum Cryptography or How Alice Outwits Eve	144 Samuel J. Lomonaco, Jr.

The	Rigidity Theorems of Hamada and Ohmori, Revisited 175 T. S. Michael

Counting Prime Divisors on Elliptic Curves and Multiplication in Finite
Fields	180
M.	Amin Shokrollahi

On Cyclic MDS-Codes	202
M.	Amin Shokrollahi

Computing Roots of Polynomials over Function Fields of Curves	214 Shuhong Gao, M. Amin Shokrollahi

Remarks on codes from modular curves: MAPLE applications	229 David Joyner and Salahoddin Shokranian
Index	251