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:
Apr. 12, 1994
Filed:
Jan. 08, 1993
Jean-Bernard Kerihuel, Paris, FR;
Maurice Martin, Paris, FR;
Alcatel N.V., Amsterdam, NL;
Abstract
In a wireless telephone service access method a caller is authenticated by: storing and keeping up to date in service control point databases words identifying each subscription and the corresponding telephone and a secret key; transmitting from the caller's telephone to a service control point words identifying the subscription and the caller's telephone; determining in the caller's telephone a first signature using the secret key and a random number; transmitting the first signature to said service control point over the user to user signaling channel; determining in said service control point a second signature using the secret key and said random number; verifying in said service control point that: the first and second signatures are identical; the word identifying the caller's subscription represents a valid subscription; and the word identifying the caller's subscription matches the word identifying the caller's telephone.