US 2007/0165844 A1 · System and method for protecting master encryption keys

Abstract

A system and method for protecting master transport encryption keys stored on a computing device. Master transport encryption keys are used to secure data communications between computing devices. In one example embodiment, there is provided a method in which a copy of a master transport encryption key is generated and stored in a volatile store of a first computing device (e.g. a mobile device). This copy of the master transport encryption key can be used to facilitate the decryption of data received at the first computing device from a second computing device (e.g. a data server), even while the first computing device is locked. The method also comprises encrypting the master transport encryption key, with a content protection key for example, and storing the encrypted master transport encryption key in a non-volatile store of the first computing device.

Claims20

Dependent claims

A method of protecting master transport encryption keys stored on a first computing device, wherein at least one master transport encryption key is used to secure data communications between the first computing device and a second computing device, the method comprising the steps of:

generating at least one temporary encryption key;
encrypting the at least one master transport encryption key;
storing the encrypted at least one master transport encryption key in a non-volatile store;
and
storing the at least one temporary encryption key in a volatile store, such that the at least one temporary encryption key is usable to facilitate decryption of data received at the first computing device from the second computing device while the first computing device is locked.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/313,657Filed 22 Dec 2005

Priority

14 Oct 2005

Published

19 Jul 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06F 21/6245
To a system of files or objects, e.g. local or distributed file system or database: protecting personal data, e.g. for financial or medical purposes
H04L 9/0822
Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely…: using…
H04L 9/0894
Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords: escrow, recovery or storing of secret…
H04L 63/06
Network architectures or network communication protocols for network security: for supporting key management in a packet data network

System and method for protecting master encryption keys

Life of this patent

System and method for protecting master encryption keys

Life of this patent

Abstract

Claims20