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:
Sep. 03, 2013
Filed:
Feb. 01, 2011
Ramakrishna R. Kotla, Sunnyvale, CA (US);
Benjamin J. Wester, Ann Arbor, MI (US);
Ramakrishna R. Kotla, Sunnyvale, CA (US);
Benjamin J. Wester, Ann Arbor, MI (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A cryptographically-secure component is used to provide read-undeniability and deletion-verifiability for messaging applications. When a messaging application of a sending node desires to send a message to a messaging application of a receiving node, the sending node requests an encryption key from the receiving node. The cryptographically-secure component of the receiving node generates an encryption key that is bound to a state of the receiving node. The messaging application of the sending node encrypts the message using the encryption key and sends the encrypted message to the messaging application of the receiving node. Because the encryption key used to encrypt the message is bound to the state associated with reading the message by the cryptographically-secure component, if the receiving node desires to decrypt and read the encrypted message, the receiving node may advance its state to the bound state to retrieve the decryption key.