Secured document and associated system and method for securing documents
AssigneeNeopost Technologies
InventorFrederic Richard
Life of this patent
Estimating the term…
Abstract
For protecting confidential information in a printed document, the invention provides a system and method for, on one hand, encrypting the confidential content of the document and then printing the part or parts of the document with confidential information in an encrypted form and the rest of the document in a non-encrypted form, and, on the other hand, decrypting the encrypted document content for display and use or for printing. In addition, for preventing unauthorized copying and tampering of a printed document, the invention provides a system and method for managing a unique tag, which is attached to the document and which authenticates the document.
Claims42
A method for printing a secured document constituted of non-confidential content readable by third parties and of encrypted confidential content whose access needs to be protected from unauthorized third parties and of an attached tag, the method comprising:
- providing a blank document with said attached tag, containing a unique tag identification,
- reading said attached tag and extracting said unique tag identification contained in said attached tag,
- generating by a computer device a unique cryptographic key,
- associating by said computer device said unique cryptographic key with said unique tag identification in a database,
- storing in said computer device said unique tag identification and said unique cryptographic key,
- identifying confidential content to be encrypted,
- encrypting said confidential content in an encrypted form with at least said cryptographic key, and
- printing on said blank document said non-confidential content and said encrypted form of said confidential content resulting in said secured document.
A computerized system for printing on a blank document including an attached tag a secured document constituted of non-confidential content readable by third parties and of encrypted confidential content whose access needs to be protected from unauthorized third parties and of said attached tag containing a unique tag identification, the computerized system comprising:
- a tag reader for reading said attached tag and extracting said unique tag identification contained in said attached tag, a cryptographic module for generating a unique cryptographic key, first and second memory for storing said unique identification tag and said unique cryptographic key and a document management module, wherein said cryptographic module is operable to encrypt confidential content in an encrypted form with at least said unique cryptographic key, and a printer for printing on said blank document said non-confidential content and said encrypted form of said confidential content resulting in said secured document, wherein said document management module is operable to associate said unique cryptographic key with said unique tag identification in a database and identify said confidential content to be encrypted.
A method for decrypting a secured document constituted of non-confidential content readable by third parties and of encrypted confidential content whose access needs to be protected from unauthorized third parties and of an attached tag containing a unique tag identification, the method comprising:
- storing in a local computer device said unique tag identification and a unique cryptographic key,
- associating by said local computer device said unique tag identification and said unique cryptographic key,
- capturing by said local computer device an image of said secured document,
- reading by said local computer device said attached tag and extracting said unique tag identification contained in said attached tag,
- comparing by said local computer device said extracted unique tag identification with said unique tag identification,
- selecting said unique cryptographic key associated with said unique tag identification based on a successful matching of said unique tag identification extracted from said attached tag with said unique tag identification, and
- decrypting by said local computer device said encrypted confidential content with at least said cryptographic key.
A local computer device for decrypting a secured document constituted of non-confidential content readable by third parties and of encrypted confidential content whose access needs to be protected from unauthorized third parties and of an attached tag containing a unique tag identification, the device comprising:
- a first memory for storing said unique tag identification and a second memory for storing a unique cryptographic key, a document capture module for capturing an image of said secured document, a tag reader for reading said attached tag and extracting said unique tag identification contained in said attached tag, a processor for uniquely associating in a database said unique tag identification and said unique cryptographic key and for selecting said unique cryptographic key based on a successful matching of said unique tag identification extracted from said attached tag with said unique tag identification, and a cryptographic module for decrypting said encrypted confidential content with at least said cryptographic key.
A secured document constituted of an attached tag and of non-confidential content readable by third parties and of encrypted confidential content whose access needs to be protected from unauthorized third parties wherein said non-confidential content and encrypted confidential content are printed on a blank document comprising said attached tag, wherein said attached tag contains a unique tag identification and said encrypted confidential content is encrypted with a cryptographic key associated with said unique tag identification.
Dependencies are inferred from the claim text.