Secure encryption and hiding of data and messages in images
Patent 6094483 Issued on July 25, 2000. Estimated Expiration Date: 
August 6, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 6, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesImage steganography system featuring perceptually adaptive and globally scalable signal embedding Data embedding employing degenerate clusters of data having differences less than noise value Patent #: 5819289 InventorsAssigneeApplicationNo. 907157 filed on 08/06/1997US Classes:380/28, PARTICULAR ALGORITHMIC FUNCTION ENCODING382/169With a gray-level transformation (e.g., uniform density transformation)ExaminersPrimary: Swann, Tod R.Assistant: Coddington, Trevor Quick Attorney, Agent or FirmInternational ClassH04N 007/167AbstractA method of encryption features the steps of first encrypting a message and then hiding (embedding) it within a digital image carrier. This is accomplished by only slightly changing the gray levels of the image carrier. The changes are imperceptible to the human eye, because they appear as random thermal noise that is commonly present in digitized images.Other References
Field of SearchPARTICULAR ALGORITHMIC FUNCTION ENCODINGBlock/data stream enciphering Data stream/substitution enciphering Key sequence signal combined with data signal BY MODIFYING OPTICAL IMAGE (E.G., TRANSMISSIVE OVERLAY) With a gray-level transformation (e.g., uniform density transformation) Gray level to binary coding Predictive coding Transform coding Quantization MISCELLANEOUS | |
