ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,686, issued on Jan. 27, was assigned to MICROSOFT TECHNOLOGY LICENSING LLC (Redmond, Wash.).

"SIP server defence against denial of service" was invented by Timothy James Pierrepont (London) and Thomas Eric Bull (Kendal, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A session initiation protocol (SIP) server contributes to defending against denial of service attacks. It receives, from a sending SIP endpoint in a communications network, such as a 5G communications network, a request to establish a communications session with a destination SIP endpoint in the communications network; computes a token from a cryptographic secret and a prop...