Secure public digital watermark
January 25, 2019. 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 ReferencesFiber interferometer rotary motion sensor Watermark detection Single sensor three dimensional imaging 5118526 Image pickup device for automatically recording the location where an image is recorded Method for providing a roving software license from one node to another node Three-dimensional vision camera Programmable high watermark in stack frame cache using second region as a storage if first region is full and an event having a predetermined minimum priority CMOS integrated microsensor with a precision measurement circuit Watermarking process resilient to collusion attacks InventorApplicationNo. 237323 filed on 01/25/1999US Classes:713/176, Authentication by digital signature representation or digital watermark380/246, Including generation of an associated coded record380/282, By public key method713/193By stored data protectionExaminersPrimary: Swann, Tod R.Assistant: Darrow, Justin T. Attorney, Agent or FirmForeign Patent References
International ClassesH04L 009/32H04L 001/44 G06F 012/14 AbstractA cryptographic device and corresponding method for producing a cloaked watermark which is a private watermark having the functionality of a public watermark. In one embodiment, the cryptographic device comprises an internal memory and a processor contained in a package. The internal memory provides a region for storage of key information used at least to produce the cloaked watermark. The processor is coupled to the internal memory and is responsible for producing a cloaked watermark based on the key and for inserting the cloaked watermark into an outgoing data set.Other References
Field of SearchIntelligent tokenAuthentication by digital signature representation or digital watermark By stored data protection Tamper resistant Nonlinear (e.g., pseudorandom) Having production of printed copy (e.g., printer, typewriter) BY MODIFYING OPTICAL IMAGE (E.G., TRANSMISSIVE OVERLAY) HAVING PRODUCTION OF PRINTED COPY (E.G., CRYPTOGRAPHIC PRINTER OR TYPEWRITER) FACSIMILE CRYPTOGRAPHY Including generation of an associated coded record By public key method By public key method | |
