Method For Preserving The Integrity of Cryptographic Keys
Original Publication Date: 1979-Jan-01
Included in the Prior Art Database: 2005-Feb-19
One of the objectives of a Cryptographic Facility System is to preserve the integrity of the cryptographic keys. It is desirable, therefore, that the keys never appear in a form readily readable and understandable (i.e., in deciphered form) except within a physically secure area within which the cryptographic device resides. The Master Key in cryptographic systems is normally stored in deciphered form within this secure area. Secondary keys are stored elsewhere enciphered under the Master Key or under variants thereof, using keys derived internally from the Master Key.