US 4562305
SOFTWARE CRYPTOGRAPHIC APPARATUS AND METHOD
Assignee
INTERNATIONAL BUSINESS MACHINES CORPORATION
Filed
Dec 22, 1982
Granted
Dec 31, 1985
Location
Bethesda MD (defense contractors)
Abstract
An improved software cryptographic apparatus and method are disclosed. The apparatus and method enables the encryption of the object code of a program so as to enable relocatable code operations. The apparatus and method will adapt program execution for a mixture of encrypted and nonencrypted code. A particular advantage of the apparatus and method is its accommodation of interrupts and branches while carrying out the cryptographic function.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
May 9, 1983
Rescinded
Sep 21, 1984
Duration
1 year, 4 months
Inventor
- 1JOHN E. GAFFNEY
Sensitive facility: Bethesda MD (defense contractors)
Record Details
- Patent number
- US 4562305
- Application
- 06452248
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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Back to patent indexSource: USPTO 35 USC §181 secrecy order records