Data authentication
AssigneeHewlett-Packard Development Company, L.P.
InventorKeith Alexander Harrison
Life of this patent
Estimating the term…
Abstract
A storage medium carrying data content has an electronically readable modification-resistant identifier for distinguishing that medium from other storage media. The medium stores a digital signature associated with a data content portion carried by the storage medium. The identifier read from the storage medium generates the digital signature. The identifier and digital signature enable verification of storage of the data content on an authorized storage medium in an authorized manner.
Claims24
A storage medium for carrying data content, comprising an electronically readable modification-resistant identifier for distinguishing said medium from other storage media, and having stored thereon a digital signature associated with a data content portion carried by the storage medium, the digital signature having been generated using said identifier, read from said storage medium, whereby the identifier and the digital signature can be used for verifying that the data content is stored on an authorised storage medium in an authorised manner.
A method of verifying that data content is stored on an authorised storage medium in an authorised manner, the storage medium bearing an electronically readable modification resistant identifier for distinguishing said medium from other storage media, comprising generating a digital signature associated with a data content portion by reading the identifier from the storage medium and encrypting a digest of a combination of the identifier and the data content portion, storing the resulting digital signature and the data content portion on the storage medium, and using the identifier and the digital signature to detect unauthorised modification of data on the storage medium.
A method for detecting the use of illicitly copied data storage media comprising the steps of:
- i) assigning a unique identifier to a medium;
- ii) recording the identifier upon a non-copyable portion of the medium;
- iii) appending a data segment corresponding to the identifier to data stored upon the medium;
- iv) inserting the medium into a reader or processor;
- v) searching the medium for the data segment and unique identifier;
- and
- vi) a) notifying a third party if either or both of the data segment or the unique identifier are not found on the medium;
- or
- vii) b) notifying a third party if upon comparison, the data segment does not correspond to the identifier.
A storage medium for carrying data content, comprising an electronically readable modification-resistant identifier for distinguishing said medium from other storage media, and having stored thereon a digital signature associated with a data content portion carried by the storage medium, the digital signature having been generated using said identifier, read from said storage medium, whereby the identifier and the digital signature can be used for verifying that the data content is stored on an authorised storage medium in an authorised manner, wherein said digital signature is generated by encrypting a digest of a combination of the identifier with at least some of the data content portion, and wherein the data content is recorded onto the storage medium substantially without modification of the form and/or content of the data content.
A storage medium for carrying data content, comprising an electronically readable modification-resistant identifier for distinguishing said medium from other storage media, and having stored thereon a digital signature associated with a data content portion carried by the storage medium, the digital signature having been generated using said identifier, read from said storage medium, whereby the identifier and the digital signature can be used for verifying that the data content is stored on an authorised storage medium in an authorised manner, wherein said digital signature is generated by encrypting a digest of a combination including the identifier and at least some of the data content portion, and wherein the data content is recorded onto the storage medium substantially without modification of the form and/or content of the data content, and wherein said digital signature is generated by encrypting a digest of a combination of the identifier, at least some of the data content portion, and a device identifier for identifying a device which effects generation and/or storage of the digital signature.
A method of detecting the use of illicitly copied data storage media, wherein (a) a medium on which the media are stored has a unique identifier assigned to it, (b) the identifier is recorded on a non-copyable portion of the medium, and (c) a data segment corresponding to the identifier is appended to data stored on the medium;
- comprising the steps of:
- searching the medium for the data segment and unique identifier;
- and
- a) notifying a third party if either or both of the data segment or the unique identifier are not found on the medium;
- or
- b) notifying a third party if upon comparison, the data segment does not correspond to the identifier.
A method of detecting the use of illicitly copied data storage media, wherein (a) a medium on which the media are stored has a unique identifier assigned to it, (b) the identifier is recorded on a non-copyable portion of the medium, and (c) a data segment corresponding to the identifier is appended to data stored on the medium;
- comprising the steps of:
- searching the medium for the data segment and unique identifier;
- and notifying a third party if either or both of the data segment or the unique identifier are not found on the medium.
A method of detecting the use of illicitly copied data storage media, wherein (a) a medium on which the media are stored has a unique identifier assigned to it, (b) the identifier is recorded on a non-copyable portion of the medium, and (c) a data segment corresponding to the identifier is appended to data stored on the medium;
- comprising the steps of:
- searching the medium for the data segment and unique identifier;
- and notifying a third party if upon comparison, the data segment does not correspond to the identifier.
Dependencies are inferred from the claim text.