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:
Dec. 21, 2021
Filed:
Nov. 11, 2019
International Business Machines Corporation, Armonk, NY (US);
Michael W. Gray, Guanaba, AU;
Narayana Aditya Madineni, Southport, AU;
Matthew Green, Canberra, AU;
Simon D. McMahon, Gold Coast, AU;
Leigh S. McLean, Nerang, AU;
Stephen J. McKenzie, Mudgeeraba, AU;
Luvita Burgess, Brisbane, AU;
Peter T. Waltenberg, Gold Coast, AU;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Transport Layer Security (TLS) connection establishment between a client and a server for a new session is enabled using an ephemeral (temporary) key pair. In response to a request, the server generates a temporary certificate by signing an ephemeral public key using the server's private key. A certificate chain comprising at least the temporary certificate that includes the ephemeral public key, together with a server certificate, is output to the client by the server, which acts as a subordinate Certificate Authority. The client validates the certificates, generates a session key and outputs the session key wrapped by the ephemeral public key. To complete the connection establishment, the server applies the ephemeral private key to recover the session key derived at the client for the new session. The client and server thereafter use the session key to encrypt and decrypt data over the link. The ephemeral key pair is not reused.