09288047 is referenced by 25 patents and cites 18 patents.

Disclosed herein are systems, methods, and non-transitory computer-readable storage media for encryption and key management. The method includes encrypting each file on a computing device with a unique file encryption key, encrypting each unique file encryption key with a corresponding class encryption key, and encrypting each class encryption key with an additional encryption key. Further disclosed are systems, methods, and non-transitory computer-readable storage media for encrypting a credential key chain. The method includes encrypting each credential on a computing device with a unique credential encryption key, encrypting each unique credential encryption key with a corresponding credential class encryption key, and encrypting each class encryption key with an additional encryption key. Additionally, a method of generating a cryptographic key based on a user-entered password and a device-specific identifier secret utilizing an encryption algorithm is disclosed.

Title
System and method for content protection based on a combination of a user pin and a device specific identifier
Application Number
14/299375
Publication Number
9288047 (B2)
Application Date
June 9, 2014
Publication Date
March 15, 2016
Inventor
Mitchell David Adler
Cupertino
CA, US
Michael Lambertus Hubertus Brouwer
San Jose
CA, US
Agent
Downey Brand
Assignee
Apple
CA, US
IPC
G06F 11/30
G06F 21/62
H04L 9/08
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