Method for encryption and transmission of digital keying data

Patent · Thu Dec 31 23:00:00 EST 1987

OSTI ID:866534

Mniszewski, Susan M ^[1]; Springer, Edward A ^[1]; Brenner, David P ^[2]

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1. Los Alamos, NM
2. North Collins, NY

A method for the encryption, transmission, and subsequent decryption of digital keying data. The method utilizes the Data Encryption Standard and is implemented by means of a pair of apparatus, each of which is selectable to operate as either a master unit or remote unit. Each unit contains a set of key encryption keys which are indexed by a common indexing system. The master unit operates upon command from the remote unit to generate a data encryption key and encrypt the data encryption key using a preselected key encryption key. The encrypted data encryption key and an index designator are then downloaded to the remote unit, where the data encryption key is decrypted for subsequent use in the encryption and transmission data. Downloading of the encrypted data encryption key enables frequent change of keys without requiring manual entry or storage of keys at the remote unit.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4731840
• OSTI ID: 866534
• Country of Publication: United States
• Language: English

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