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Cryptographic Master Key Entry Checking Procedure Disclosure Number: IPCOM000069367D
Original Publication Date: 1978-Apr-01
Included in the Prior Art Database: 2005-Feb-20

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Ehrsam, WF Matyas, SM Meyer, CH [+details]


This checking procedure verifies the entry of a cryptographic master key KM, and insures that the key entered is actually set to the value intended. There are essentially two sources of error which can cause the master key to be loaded incorrectly. The first is caused by human error when a person is required to enter the master key as by manually setting switches, dials or keying into a key entry device. The second results from nonhuman errors which may be due to system errors, causing the key in main memory to be different from the key loaded in at the input or causing the key in the master key (MK) memory to be different from the key loaded from main memory.