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:
Aug. 03, 1993
Filed:
Feb. 19, 1991
Applicant:
Inventor:
Sanford S Shapiro, Canogo Park, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
H04K / ; H04K / ; G07D / ;
U.S. Cl.
CPC ...
380 23 ; 34082534 ; 380 25 ;
Abstract
A system is provided for enabling use of a password or PIN (personal identification number) to prove authority for access to a data base, where the PIN cannot be safely transmitted to a verifying authority. The PIN is entered into a calculating circuit which produces a TPIN (translated PIN) which can be safely transmitted to the verifying authority. The TPIN has fewer digits than the PIN to avoid a one-to-one correspondence of each PIN to each TPIN. For example, a six digit PIN may yield a three digit TPIN. The present time is also entered into the calculating circuit and an algorithm for generating the TPIN uses the present time, so for a given PIN the TPIN repeatedly changes.