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:
Feb. 20, 2001
Filed:
Dec. 24, 1996
Frederick W. Ryan, Jr., Oxford, CT (US);
Robert W. Sisson, Shelton, CT (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
A method is provided for establishing mutual authentication and secure communications between an microprocessor-based transaction evidencing device and a microprocessor-based server coupled thereto. A session key K,is generated at the transaction evidencing device and encrypted with a first key K,to form a first message. The first message is sent to the server and decrypted using a second key K,. In response to the first message a second message is generated at the server and encrypted using the session key K,. The encrypted second message is sent to the transaction evidencing device and decrypted using the session key K,. A response to the second message is generated at the transaction evidencing device and is signed using a third key K,. The signed response is encrypted with the session key K,and transmitted to the server. The encrypted signed response is decrypted using the session key K,and the signature is verified using a fourth key k,.