plaintext attack, Cryptologia, 23(2), July 1999, pp139–156. Louis Kruh, The Hagelin Cryptographer, Type C-52, Cryptologia 3(2), April 1979, pp78–82. Jan Bury, From the Archives: CX-52 Messages Read by Red Poles?, Cryptologia 33(4), October 2009, pp347–352. Jan Bury, Polish Cold War Codebreaking of 1959–1989: A Preliminary Assessment, Cryptologia 36(4), October 2012, pp341–379. Technical details of the C-52 and CX-52 Encryption principle and machine variations, by Dirk Rijmenants Dirk Rijmenants' Hagelin BC-52 Simulator The HAGELIN cryptographer CX-52 by Torbjorn Andersson — a write-up, photograph and a QBASIC simulator. Jerry Proc's page on the CX-52 — also covers the B-52 keyboard unit. Photographs: , , , , , Jerry Proc's page on the Hell 54 — a licensed copy of the C-52 by Hell Descriptions from sales of C-52 and CX-52 equipment CX-52 Cryptographic Machine & B-52 Motorized Base CX-52-related Stasi files Encryption devices