CRYPTOLOGIA

Volume 19, Number 3, July 1995

Title	Authors	page
Cryptanalysis for Peacetime: Codebreaking and the Birth and Structure of the United nations	Stephen Schlesinger	217
The Book Cipher System of the Wehrmacht	Michael van der Meulen	247
A Dutch Enciphered Code	David Alvarez	261
A Fast Method for Cryptanalysis of Substitution Ciphers	Thomas Jakobsen	265
The Quadratic and Double Quadratic Residue Ciphers	Frank Rubin	275
Strong Theoretical Stegnography	Peter Wayner	285