Patent ID: 11863539
Assignee: ZOOM VIDEO COMMUNICATIONS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A device comprising:
a communications interface;
a non-transitory computer-readable medium; and
one or more processors communicatively coupled to the communications interface and the non-transitory computer-readable medium, the one or more processors configured to execute processor-executable instructions stored in the non-transitory computer-readable medium to:
generate an enrollment request and a corresponding cryptographic signature, wherein the cryptographic signature of the enrollment request is generated by using a private cryptographic key of the device, wherein the enrollment request includes a set of long-term cryptographic keys of the device to be added into a new sequential record in a signature chain;
transmit, to an enrolled device associated with a user account, the enrollment request and the cryptographic signature;
receive, from the enrolled device, an encrypted attestation message indicating that the device has been authenticated;
detect an input of a passcode, wherein the passcode is generated and displayed by the enrolled device;
use the passcode to derive a symmetric key;
decrypt the encrypted attestation message using the symmetric key, thereby generating a decrypted attestation message; and
transmit, to a device management system, the decrypted attestation message and the set of long-term cryptographic keys, wherein the new sequential record is added into the signature chain and includes the decrypted attestation message and the set of long-term cryptographic keys.