| 7028188 |
Document authentication using the physical characteristics of underlying physical media |
| Apr-11-2006 |
A method for authenticating a document in which a document key for the document is generated by examining one or more attributes of a physical media that underlies the document. An original image is then... |
| 7009419 |
Method and apparatus for selecting an encryption integrated circuit operating mode |
| Mar-7-2006 |
A method and circuit for preventing external access to secure data of an integrated circuit while supporting DFT is disclosed. In accordance with the method the integrated circuit is automatically placed... |
| 6999947 |
License devolution apparatus |
| Feb-14-2006 |
There is provided a license devolution system for devolving the right of using as to contents. The license devolution system makes it possible to copy or distribute contents while contributing to a protection... |
| 6980654 |
System and method for authenticating an article |
| Dec-27-2005 |
A method of applying an authentication image to an article is presented. The method comprises obtaining a digitized version of the authentication image, encoding the digitized version of the authentication... |
| 6968057 |
Emulsion products and imagery employing steganography |
| Nov-22-2005 |
Images are steganographically marked with codes that can be used, e.g., by reference to a remote registry, to identify the image proprietors. Some embodiments pre-mark blank emulsion film or paper products... |
| 6931130 |
Dynamically adjustable software encryption |
| Aug-16-2005 |
A method, system, and computer program product for dynamically adjusting the encryption level based on the geographic location of a software program are disclosed. The method includes an initial step of... |
| 6928162 |
Method and system for manipulating and telescoping a hash function |
| Aug-9-2005 |
A method and system for providing a hash and a complement of the hash for an item in a computer system are disclosed. The method and system include providing a plurality of components from the item. The... |
| 6907124 |
Optical encryption and decryption method and system |
| Jun-14-2005 |
The invention relates to securing of information utilising optical imaging technologies and more specifically to phase encryption and decryption of images. An image is encrypted into a mask having a plurality... |
| 6873975 |
Content usage control system, content usage apparatus, computer readable recording medium with program recorded for computer to execute usage method |
| Mar-29-2005 |
A content usage control system comprises a copyright holder system, content server, license server and user system. The ACL setting section of the copyright holder system sets a license ACL expressed as... |
| 6816594 |
Elliptic curve generating method and device, elliptic encryption system and recording medium |
| Nov-9-2004 |
It is an object of the present invention to provide a method and an apparatus for generating a safe normal form elliptic curve transformable to a Montgomery type elliptic curve as well as to provide an... |
| 6798883 |
Method of testing a randomizer |
| Sep-28-2004 |
A method of testing a randomizer having at least one source of probabilistic data and a device for mixing the probabilistic data to form random data, where the probabilistic data includes at least two... |
| 6754348 |
System and method for determining winner |
| Jun-22-2004 |
A system and method for determining winner is capable of keep all of the voting contents secret with permitting only determination of winning or losing, and further permitting the third party to verify... |
| 6751320 |
Method and system for preventing reproduction of professional photographs |
| Jun-15-2004 |
A reproduction apparatus (e.g., photo kiosk) includes a lens for imaging a customer-provided original onto an opto-electronic detector for producing image data, and a reproduction system for producing... |
| 6751321 |
Digital data reproduction device |
| Jun-15-2004 |
A source of MPEG2 video data is connected with a dedicated AV device or personal computer by means of an IEEE 1394 interface. A transmission unit in the source has an IEEE 1394 encryption unit and a sending... |
| 6731754 |
Apparatus and method for maintaining and transmitting secret contents of a signal |
| May-4-2004 |
The secrecy security of coded data can be improved markedly by making it possible to freely vary, within a plurality of natural numbers, the values as the result of coding and decoding operations by a... |
| 6683953 |
Encoding method, encoding-decoding apparatus, and code communications system |
| Jan-27-2004 |
Instead of immediately encrypting a plain text, a n-bit plain text is first converted to a m-bit of expanded plain text in order to limit the weight of the plain text to w, and that expanded plain text... |
| 6678378 |
3-dimensional shape data encryption and decryption |
| Jan-13-2004 |
Encryption and decryption methods for 3-dimensional shape data, especially copyrighted data, useful for detecting unauthorized use or piracy of a 3-dimensional object's shape represented by the 3-dimensional... |
| 6664803 |
Method and apparatus for selecting an encryption integrated circuit operating mode |
| Dec-16-2003 |
A method and circuit for preventing external access to secure data of an integrated circuit while supporting DFT is disclosed. In accordance with the method the integrated circuit is automatically placed... |
| 6549624 |
Apparatus and method for enhancing the security of negotiable documents |
| Apr-15-2003 |
The invention relates to an apparatus and method for enhancing the security of selected information associated with a negotiable document, such as the monetary value of a cheque. In the invention, one... |
| 6537747 |
Data transmission using DNA oligomers |
| Mar-25-2003 |
The present invention is directed to methods for (a) encrypting information in the form of words, numbers, or graphical images, by obtaining a set of nucleic acid strands or nucleic acid analog strands... |
| 6530023 |
Method and device that validates time of an internal source using an external source |
| Mar-4-2003 |
Digital data is provided with a time stamp of an internal time signal of an internal clock. The internal time signal is validated by receiving and evaluating an internal broadcast or a cable signal of... |
| 6466048 |
Method and apparatus for switchably selecting an integrated circuit operating mode |
| Oct-15-2002 |
A method and circuit for preventing external access to secure data of an integrated circuit while supporting DFT is disclosed. In accordance with the method the integrated circuit is automatically placed... |
| 6445796 |
Automatic telephone-line disconnect system |
| Sep-3-2002 |
A telephone disconnect system having a current-sensitive relay which automatically operates to electrically connect the telephone lines to the telephone network when the cradle switch of the telephone... |
| 6438231 |
Emulsion film media employing steganography |
| Aug-20-2002 |
Technology is now available permitting consumers to make amateur- or even professional-grade copies of photographs. For wedding and portrait photographers, in particular, the business of making duplications... |
| 6373950 |
System, method and article of manufacture for transmitting messages within messages utilizing an extensible, flexible architecture |
| Apr-16-2002 |
Secure transmission of data is provided between a plurality of computer systems over a public communication system, such as the Internet. Secure transmission of data is provided from a customer computer... |
| 6320966 |
Cryptographic methods for demonstrating satisfiable formulas from propositional logic |
| Nov-20-2001 |
Cryptographic methods are disclosed, which allow a prover party, who holds a number of secrets, to demonstrate satisfiable formulas of propositional logic, wherein the atomic propositions are linear relations... |
| 6317499 |
Storage device random bit generator |
| Nov-13-2001 |
The present invention is an apparatus for generating random bits from a computer system. The apparatus comprises a rotating storage device operating within the computer system. A rotational latency of... |
| 6314409 |
System for controlling access and distribution of digital property |
| Nov-6-2001 |
A method and device are provided for controlling access to data. Portions of the data are protected and rules concerning access rights to the data are determined. Access to the protected portions of the... |
| 6314189 |
Method and apparatus for quantum communication |
| Nov-6-2001 |
A quantum state or qubit is transmitted from a sender to receiver using a quantum teleportation. For this purpose, first, second and third photons are successively produced from a laser source. The first... |
| 6289453 |
Method and apparatus for secure measurement certification |
| Sep-11-2001 |
The invention relates to methods and apparatuses for acquiring a physical measurement, and for creating a cryptographic certification of that measurement, such that its value and time can be verified by... |
| 6282611 |
Digital information system, digital audio signal processor and signal converter |
| Aug-28-2001 |
In a digital information system for realizing the sale of information or the like having a commercial value in the form of a digital signal, and an audio processor, and signal processor suitably used with... |
| 6272632 |
System and method for controlling access to a user secret using a key recovery field |
| Aug-7-2001 |
A system and method for data recovery is described. In one embodiment, an encrypting system encrypts a message or file using a secret key (KS) and attaches a key recovery field (KRF), including an access... |
| 6246991 |
Will information management and disclosure system and method, and program storage medium thereof |
| Jun-12-2001 |
A will information management and disclosure system keeps in custody deposit information that includes information about a depositor's last word and testament to be unsealed in accordance with unsealing... |
| 6192128 |
Current-sensitive telephone-line disconnect system |
| Feb-20-2001 |
The circuit uses a current sensing device that is controlled by the telephone line current. The telephone lines are connected to the contacts of a push-button switch, and a diode bridge is connected across... |
| 6175625 |
Control circuits for electric coding machines |
| Jan-16-2001 |
The machine involves code wheels in cascade or in a maze with random or mixed circuits which operate a printing device to print the cipher conjugate of the letter on an operated key when the keyboard is... |
| 6154841 |
Digital signature method and communication system |
| Nov-28-2000 |
A system for enabling verified or verifiable communications while maintaining anonymity, in which a common public parameter, such as a prime number, and a registered signature are changed, respectively,... |
| 6148083 |
Application certification for an international cryptography framework |
| Nov-14-2000 |
An application which requests cryptographic services from various service elements within an international cryptography framework is identified through a certificate to protect against the misuse of a... |
| 6130946 |
Cryptographs |
| Oct-10-2000 |
The cryptographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of... |
| 6128740 |
Computer security system and method with on demand publishing of certificate revocation lists |
| Oct-3-2000 |
A computer network security system provides generation of a certificate revocation list (CRL) upon each revocation. The entire certificate revocation list may be published on demand, or only the portion... |
| 6128389 |
Authentication key management system and method |
| Oct-3-2000 |
A system and method for enabling sensitive authentication information to be under the control of the service provider and transmitting only non-sensitive authentication information to the AC, and for providing... |
| 6111954 |
Steganographic methods and media for photography |
| Aug-29-2000 |
Technology is now available permitting consumers to make amateur- or even professional-grade copies of photographs. For wedding and portrait photographers, in particular, the business of making duplications... |
| 6108419 |
Differential fault analysis hardening apparatus and evaluation method |
| Aug-22-2000 |
A method of evaluating a cryptosystem to determine whether the cryptosystem can withstand a fault analysis attack, the method includes the steps of providing a cryptosystem having an encrypting process... |
| 6097812 |
Cryptographic system |
| Aug-1-2000 |
The crytographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of... |
| 6088452 |
Encoding technique for software and hardware |
| Jul-11-2000 |
An encoding technique of the invention protects software programs and hardware designs from being copied, tampered with, and its functions from being exposed. The software programs and hardware designs... |
| 6085178 |
Apparatus and method for communicating between an intelligent agent and client computer process using disguised messages |
| Jul-4-2000 |
An intelligent agent and its client communicate using a selector known by both parties to generate and interpret messages and thereby effectively disguise confidential information transmitted in the messages... |
| 6078668 |
Apparatus and method for concealing data bursts in an analog scrambler using audio repetition |
| Jun-20-2000 |
An apparatus and method for concealing data bursts in an analog scrambler using audio repetition. What otherwise would be periodic data bursts appearing at the audio output are replaced with samples from... |
| 6061450 |
Alternate telephone system |
| May-9-2000 |
Apparatus for routing local calls around the local exchange carrier includes an intelligent call diverter (ICD) which stores the Automatic Number Identification Code (ANI) of the calling telephone, and... |
| 6011850 |
Securized, multifunction, acquisition and processing terminal usable in the banking sector, in connection with games and in the electronic management of documents |
| Jan-4-2000 |
The present invention relates to a securized, multifunction, acquisition and processing terminal more particularly usable in the banking sector, in connection with games and/or in the electronic management... |
| 6005936 |
System for embedding authentication information into an image and an image alteration detecting system |
| Dec-21-1999 |
A digital camera for embedding authentication information to detect the identity of a photographed image into an image. By supplying the authentication information integrally with image data, the verifier... |
| 5987135 |
System and method for controlling and monitoring remote distributed processing system |
| Nov-16-1999 |
A system and method for controlling and monitoring remote distributed processing systems from one or more control processing systems by downloading agent-application programs from the control processing... |
