IDENTIFICATION OF A CREATOR OF AN ENCRYPTED OBJECT

WIPO Patent Application WO/2021/232934

A1

A method, computer system, and a computer program product for encrypting an object such that the creator of the encrypted object can be identified is provided. The method may include receiving, by a processor, an unencrypted object that includes plaintext and metadata that describes the plaintext and obtaining, by the processor in response to a request from a user, a data encryption key (DEK) and a nonce key for the unencrypted object, the nonce key being unique to the user. The method may also include encrypting, by the processor, the unencrypted object. The encrypting includes generating a nonce based at least in part of the plaintext and the nonce key and generating ciphertext and a metadata authentication tag comprising a signature of the metadata, the generating based at least in part on the plaintext, the metadata, the DEK, and the nonce. The method may further include creating an encrypted object that includes the ciphertext, the metadata, and the metadata authentication tag.

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SOFIA ANTHONY THOMAS (US)
DEROBERTIS CHRISTOPHER V (US)
KATONICA JASON G (US)

PCT/CN2021/082667

November 25, 2021

March 24, 2021

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IBM (US)
IBM CHINA CO LTD (CN)

H04L9/32

WO2006015182A2

2006-02-09

US20190356468A1	2019-11-21
CN102725737A	2012-10-10
CN107534558A	2018-01-02
US20150244529A1	2015-08-27

CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)

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