Patent · US Active

Key derivation

US9247429B2 · kind B2 · utility

2Cited by

1References

20Claims

0Family size

Assignee

VODAFONE IP LICENSING LIMITED · GB

Inventors

Stephen Babbage · Newbury, GB
Nicholas Bone · Thatcham, GB

Key dates

Filing date	Dec 15, 2011
Grant date	Jan 26, 2016
Priority date	—
Expiry date	Feb 28, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2463/061
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

To facilitate a change in network authentication key (Ki) for use by a smart card (SIM) during authentication on a cellular telecommunications network, there is provided a smart card management scheme that combines key derivation with over the air (OTA) provisioning. This scheme ensures both that the Ki is never transmitted OTA and that the Ki is stored in two locations only: on the SIM and at an authentication center (AuC).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.