Digital camera with apparatus for authentication of images produced from an image file
May 24, 2015. 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 ReferencesProtection system for intelligent cards Cartridge-controlled system whose use is limited to authorized cartridges Method and system for personal identification Public key/signature cryptosystem with enhanced digital signature certification System for the secure storage and transmission of data System and method for scrambling and/or descrambling a video signal Encryption device Patent #: 5321749 InventorAssigneeApplicationNo. 449472 filed on 05/24/1995US Classes:713/179, Including generation of associated coded record348/207.99, CAMERA, SYSTEM AND DETAIL348/441, FORMAT CONVERSION348/460, DIVERSE DEVICE CONTROLLED BY INFORMATION EMBEDDED IN VIDEO SIGNAL348/469, FORMAT348/552, COMBINED WITH DIVERSE ART DEVICE (E.G., COMPUTER, TELEPHONE)380/30, Public key380/246Including generation of an associated coded recordExaminersPrimary: Buczinski, Stephen C.Attorney, Agent or FirmInternational ClassesH04N 007/167H04K 001/00 H04L 009/00 AbstractA digital camera equipped with a processor for authentication of images produced from an image file taken by the digital camera is provided. The digital camera processor has embedded therein a private key unique to it, and the camera housing has a public key that is so uniquely related to the private key that digital data encrypted with the private key may be decrypted using the public key. The digital camera processor comprises means for calculating a hash of the image file using a predetermined algorithm, and second means for encrypting the image hash with the private key, thereby producing a digital signature. The image file and the digital signature are stored in suitable recording means so they will be available together. Apparatus for authenticating the image file as being free of any alteration uses the public key for decrypting the digital signature, thereby deriving a secure image hash identical to the image hash produced by the digital camera and used to produce the digital signature. The authenticating apparatus calculates from the image file an image hash using the same algorithm as before. By comparing this last image hash with the secure image hash, authenticity of the image file is determined if they match. Other techniques to address time-honored methods of deception, such as attaching false captions or inducing forced perspectives, are included.Other References
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