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:
Jan. 20, 2026
Filed:
Jul. 27, 2023
Zoom Video Communications, Inc., San Jose, CA (US);
Balachandar Ganesh Kesavan, New York, NY (US);
Antonio Marcedone, New York, NY (US);
Zoom Communications, Inc., San Jose, CA (US);
Abstract
Tree-based key storage can be used to selectively grant access to an encrypted conversation history. For example, a system can access a ciphertext tree that includes an internal node with a set of child nodes. The internal node can correspond to a key and a ciphertext. The ciphertext can be generated by encrypting a set of child keys, corresponding to the set of child nodes, using the key. The set of child keys may have been used to encrypt messages associated with a conversation. The system can then provide the ciphertext to a client device. The client device can receive the key from a source, decrypt the ciphertext using the key to derive the set of child keys corresponding to the set of child nodes, and decrypt at least some of the encrypted messages using at least one key of the set of child keys.