International Business Machines Corporation

Brandon S Johnson

Michael D Hocker

Sanjay Upreti

A method, apparatus and computer program product for secure communication includes receiving a message for transmission from a transmitting node to a receiving node. The message is split into a plurality of channels and each channel receives an identical copy of the message. Noise data is added to each version of the message. The noise data is different for a respective copy of the message than any other version of the message thus producing a plurality of ciphers each for a respective channel. The ciphers are transmitted via the respective channels from the transmitting node to the receiving node.

Secure communication using multichannel noise

A computing system may be protected from revoked system updates. A computing system receives an object and scans it for revocation updates to a security structure of the computing system. The security structure is a monotonically nondecreasing collection of segments containing data on whether a system update is revoked, and a system update's status as revoked signifies the revoked system update can no longer be used by the computing system. Based upon scanning the object, the computing system identifies and validates a revocation update. The computing system resolves the revocation update by applying the revocation update to the security structure, by adding or changing one or more segments of the security structure identified by the revocation update, in response to determining that the revocation update is valid, or by denying application of the revocation update to the security structure in response to determining that the revocation update is invalid.

Protection for computing systems from revoked system updates

A computing system may be protected from revoked system updates. A computing system receives an object and scans it for revocation updates to a security structure of the computing system. The security structure is a monotonically nondecreasing collection of segments containing data on whether a system update is revoked and a system update's status as revoked signifies the revoked system update can no longer be used by the computing system. Based upon scanning the object, the computing system identifies and validates a revocation update. The computing system resolves the revocation update by applying the revocation update to the security structure, by adding or changing one or more segments of the security structure identified by the revocation update, in response to determining that the revocation update is valid, or by denying application of the revocation update to the security structure in response to determining that the revocation update is invalid.

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Lexington, KY, United States of America

Brandon S Johnson