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:
Jul. 26, 2022
Filed:
Dec. 17, 2021
Ernest Brickell, Hillsboro, OR (US);
Ernest Brickell, Hillsboro, OR (US);
BRICKELL CRYPTOLOGY LLC, Hillsboro, OR (US);
Abstract
Methods and apparati for auditing uses of audited cryptographic keys. In a method embodiment of the present invention, a set of audited uses for an audited cryptographic key is defined; the key is used inside a protected execution environment of a digital computer; a digitally signed audit record describing an instance of use of the audited cryptographic key is released for each audited use of the audited cryptographic key; a signed receipt of digitally signed audit records is received from an auditor; a digital signature of the signed receipt of the auditor is verified inside the protected execution environment using a public verification key of the auditor; the set of audit records that have not been verified by the auditor is determined; a set of allowable conditions for the set of non-verified audit records is stored; and the protected execution environment is prevented from outputting the results of an instance of an audited use of the audited cryptographic key when the set of non-verified audit records does not meet all of the conditions in the set of allowable conditions.