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:
Jul. 27, 2010
Filed:
Oct. 20, 2004
Andrew B. Philips, San Francisco, CA (US);
Andrew B. Philips, San Francisco, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
One embodiment of the present invention provides a system that uses a password-derived prime number to facilitate a secure key exchange between a client and a server across a network. During operation, the client receives a password from a user. Next, the client uses the password to determine a prime number P associated with the password. The client then uses the prime number P to determine a generator g associated with P. The client uses this prime number to calculate X=gmod P, wherein x is a random number generated by the client. Next, the client sends X to the server. The client also receives Y=gmod P from the server, wherein y is a random number generated by the server. The client then computes a secret key K=Ymod p at the client, which the server can similarly obtain by computing K=Xmod p. In this way, the client and the server can both obtain the same secret key Kthrough insecure communications over the network.