The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1986
Filed:
Mar. 07, 1983
Applicant:
Inventor:
Martin M Atalla, Atherton, CA (US);
Assignee:
Atalla Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ; H04L / ;
U.S. Cl.
CPC ...
34082531 ; 235382 ; 34082534 ; 178 2208 ; 178 2209 ;
Abstract
An improved file access security technique and associated apparatus accesses data which is stored in encrypted form under one encryption key and re-stores the data re-encrypted under another encryption key, and produces a record of each access and data re-encryption both as the control source of encryption keys for access and re-entry of encrypted data and as a secured audit record of users that had access to each file.
Published as:
GB8405950D0; GB2136175A; DE3407642A1; FR2542471A1; JPS59169000A; ZA841400B; GB2136175B; US4588991A; JPS6242304B2; DE3407642C2;