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	Postmarked 870204	  Received 870219
			CRYPTOLOGIA
	A Quarterly Journal Devoted to Cryptology
	Volume XI Number 1	     January 1987

		     Table of Contents

1  A Survey of Data Insecurity Packages
	Martin Kochanski
[Five popular IBM PC encryption products ruthlessly cracked.]

16 Chosen-Key Attacks on a Block Cipher
	Robert Winternitz and Martin Hellman
[Reducing the keyspace by assembling a dictionary of variants.]

21 Equivalence Classes: Toward More Efficient Search
	Samuel Levitin
[Winner of the 1986 CRYPTOLOGIA Undergraduate Paper Competition.
 The Crypt Breakers' Workbench package is helped by algorithms
 that identify which ciphertext will yield the most information.]

29 With the 849th SIS, 1942-45
	Joseph S. Schick
[WW2 memoirs of an American Professor of English Literature.]

40 The Potus-Prime Connection: Two Notes

40 Roosevelt, Churchill and Me
	Bradford Hardie
[How our hero ran into the President by being out of uniform.]

44 History of Converter M-134-C Top Secret
[The WW2 trans-Atlantic "zero" link: direct-connect circa 1942.]

47 Cryptology Courses at Kean College
	C.A. Deavours

51 Review and Things Cryptologic
	Louis Kruh

 Published Quarterly at Rose-Hulman Institute of Technology,
		 Terre Haute, Indiana, 47803, USA.
Subscriptions $28.00 per year US; $36.00 (US) per year non-US.  

[The new laser-printer typesetting is a distinct improvement.]
-- 
Richard Outerbridge	<outer@utcsri.UUCP>	 (416) 961-4757
Payload Deliveries:	N 43 39'36", W 79 23'42", Elev. 106.47m.