Patent ID: 8082592

Claim:
A method, comprising: storing first decryption information on a read/write device, said first decryption information associated with a first decrypt ability count, that indicates a first quantity of device-specific decryption keys that can be created from said first decryption information; reading at least part of said first decryption information from said read/write device; and responsive to said reading, writing information to said read/write device that indicates a second decrypt ability count, which represents a second quantity of device specific decryption keys, where said second quantity is a less quantity than said first quantity, where the less quantity of device specific decryption keys reduces an ability of said read/write device to allow subsequent reading of said decryption information, responsive to said reading, also writing information to said read/write device indicating a device specific decryption information that was created using said first decryption information, and where said device specific decryption information is usable without being limited by said first or second decrypt ability count.