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US 8,479,020 B2Granted
Method and apparatus for providing an asymmetric encrypted cookie for product data storage
AssigneeMotorola Mobility LLC
InventorEric Sprunk
Life of this patent
Estimating the term…
Abstract
A process may be utilized by a device to implement public key asymmetric encryption. The process encrypts a data set with a symmetric encryption key to form an encrypted data set. Further, the process encrypts the symmetric encryption key with a public key component of an asymmetric encryption key to form an asymmetric encrypted cookie. Finally, the process stores the encrypted data set and the asymmetric encrypted cookie in a non-secure area of a storage medium.
Claims17
A method comprising:
- encrypting a data set with a symmetric encryption key to form an encrypted data set;
- encrypting the symmetric encryption key with a public key component of an asymmetric encryption key to form an asymmetric encrypted cookie;
- storing the encrypted data set and the asymmetric encrypted cookie in a non-secure area of a storage medium;
- storing the symmetric encryption key in a secure area of the storage medium;
- and
- retrieving a private key component of the asymmetric encryption key if the secure area of the storage medium malfunctions.
3 more elements
A method comprising:
- storing a private key component of an asymmetric encryption key on a storage medium external to a device;
- and
- decrypting, with a private key component of the asymmetric encryption key, an asymmetric encrypted cookie stored in a non-secure area of a storage medium internal to the device if a secure area of the storage medium internal to the device malfunctions;
- wherein the asymmetric encryption key has been encrypted with a public key component of the asymmetric encryption key.
1 more element
A method comprising:
- encrypting a data set with a data encryption key to form an encrypted data set;
- storing the data encryption key in a secure area of a storage medium in a device;
- encrypting the data encryption key with a public key component of a key recovery key to form an asymmetric encrypted cookie;
- storing the encrypted data set and the asymmetric encrypted cookie in a non-secure area of the storage medium in the device;
- and
- retrieving a private key component of the key recovery key from a storage medium external to the device if the secure area of the storage medium in the device malfunctions.
3 more elements
Dependencies are inferred from the claim text.