Patent ID: 11863671
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A non-transitory machine-readable medium storing instructions to cause one or more processors on an electronic device to perform operations comprising:
receiving, at an accessory device, an encrypted portion of an account recovery key, wherein the encrypted portion of the account recovery key is a first portion of the account recovery key;
transmitting, to a primary device, the first portion of the account recovery key from the accessory device, the first portion of the account recovery key having been decrypted from the encrypted portion of the account recovery key, wherein decrypting the first portion of the account recovery key includes:
computing a first portion of the cryptographic material based in part on a first key of an ephemeral key pair and the encryption key;
computing a second portion of the cryptographic material based in part on a second key of the ephemeral key pair and the first portion of the cryptographic material; and
encrypting the portion of the account recovery key using the second portion of the cryptographic material.