Unbreakable cipher | Article about unbreakable cipher by The Free Dictionary
unbreakable cipher[¦ən′brāk·ə·bəl ′sī·fər]
A cipher for which the message or key cannot be obtained through cryptanalysis, even with an unlimited amount of computational power, data storage, and calendar time.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
He became a cryptographer for the US Government during the Second World War and helped develop the world's first unbreakable cipher
. He loved to tinker with electronic switches and invented an electromechanical mouse which he called 'Theseus'.
It is proven that when the length of the message (in other words, if the rate at which the key can be transported) equals the data speed, the encryption performed on the message through a simple technique such as exclusive OR operation will be theoretically unbreakable cipher