| 7024554 |
Systems and methods that authorize target devices utilizing proprietary software and/or hardware |
| Apr-4-2006 |
An integrated system comprises an authorization device that generates a second encrypted data stream in response to a first data stream, and a programmable logic device (PLD) that generates a third encrypted... |
| 6990387 |
Test system for identification and sorting of integrated circuit devices |
| Jan-24-2006 |
A system for identifying and sorting integrated circuit devices based on an encrypted Fuse ID information such as manufacturing and test information stored in the integrated circuit device, includes a... |
| 6985581 |
Method and apparatus to verify circuit operating conditions |
| Jan-10-2006 |
A circuit includes an operation unit adapted to perform a circuit operation in a plurality of rounds. The operation unit may operate properly under a predetermined range of operating conditions. The operation... |
| 6973579 |
Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| Dec-6-2005 |
A code is produce for use in scrambling or descrambling data associated with a high speed shared control channel (HS-SSCH) for a particular user equipment. A user identification of the particular user... |
| 6959085 |
Secure user identification based on ring homomorphisms |
| Oct-25-2005 |
A method for authenticating, by a second user, the identity of a first user, that includes a challenge communication from the second user to the first user, a response communication from the first user... |
| 6880081 |
Key management for content protection |
| Apr-12-2005 |
A method for content access control operative to enable authorized devices to access protected content and to prevent unauthorized devices from accessing protected content, the method comprising: providing... |
| 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... |
| 6792542 |
Digital system for embedding a pseudo-randomly modulated auxiliary data sequence in digital samples |
| Sep-14-2004 |
A system for embedding auxiliary digital information (D.sub.i) into an existing primary digitally encoded signal (X.sub.n) to form an unobjectionable composite digital signal (C.sub.n). Auxiliary data... |
| 6775778 |
Secure computing device having boot read only memory verification of program code |
| Aug-10-2004 |
A secure computing system stores a program, preferably the real time operating system, that is encrypted with a private key. A boot ROM on the same integrated circuit as the data processor and inaccessible... |
| 6765497 |
Method for remotely accessing vehicle system information and user information in a vehicle |
| Jul-20-2004 |
A communication system includes a vehicle (101) and an infrastructure (160). The vehicle contains vehicle system information (104) and user information (112). The infrastructure includes a processor (154)... |
| 6504929 |
Encryption strength evaluation support apparatus and recording medium recording encryption strength evaluation support program |
| Jan-7-2003 |
An encryption strength evaluation support apparatus includes a statistical data sampling program executing means for statistically obtaining correlations between individual bits of input and output data... |
| 6252964 |
Authorization of services in a conditional access system |
| Jun-26-2001 |
A cable television system provides conditional access to services. The cable television system includes a headend from which service "instances", or programs, are broadcast and a plurality of set top units... |
| 6219420 |
High assurance encryption system and method |
| Apr-17-2001 |
A processor (22) of an encryption system (20) receives plain text (24) and operates an encryption algorithm to convert the plain text (24) to cipher text (26). A state monitor (30) confirms a conversion... |
| 6144740 |
Method for designing public key cryptosystems against fault-based attacks with an implementation |
| Nov-7-2000 |
Disclosed is a method for designing public key cryptosystems against fault-based attacks in which secret information stored in a tamperfree device is revealed during the encryption/decryption or signature... |
| 6144739 |
Computer network protection using cryptographic sealing software agents and objects |
| Nov-7-2000 |
A method and apparatus for protecting software objects from external modification is described. A cryptographic seal protects the object at the object level and also supports secure inter-object communication.... |
| 6122372 |
System and method for encapsulating transaction messages with verifiable data generated identifiers |
| Sep-19-2000 |
A data structure and method are disclosed for encapsulating a message with a verifiable message ID and a verifiable identification of message interpretation information. The encapsulated message includes... |
| 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... |
| 6101254 |
Security method for making secure an authentication method that uses a secret key algorithm |
| Aug-8-2000 |
The security method is associated with an authentication method comprising steps of obtaining a calculated result from a random number subjected to a secret key algorithm, the security method includes... |
| 6061703 |
Pseudorandom number generator with normal and test modes of operation |
| May-9-2000 |
Pseudorandom numbers are generated in a cryptographic module in a cryptographically strong manner by combining a time-dependent value with a secret value and passing the result through a one-way hash function... |
| 6047066 |
Communication method and device |
| Apr-4-2000 |
A system (100) and method of improving activation security allows a remote device (104) to identify that there is a difference between a first signal transmitted by a central site (102) and a first signal... |
| 6038549 |
Portable 1-way wireless financial messaging unit |
| Mar-14-2000 |
A secure messaging system including a secure messaging system controller (1100) and a first financial messaging unit (906). A user initiates a financial transaction by providing a transaction authentication... |
| 5995628 |
Failsafe security system and method |
| Nov-30-1999 |
Controllable functions (210, 220, 230) and controllable connection managers (212, 222, 216, 226) are used to provide a fail-safe security system implemented on a single processor (200). Red subsystems,... |
| 5991415 |
Method and apparatus for protecting public key schemes from timing and fault attacks |
| Nov-23-1999 |
Improved methods and apparatus are provided for protecting public key schemes based on modular exponentiation (including RSA and Diffie-Hellman) from indirect cryptanalytic techniques such as timing and... |
| 5982890 |
Method and system for detecting fraudulent data update |
| Nov-9-1999 |
A method and system for detecting fraudulent data update of databases connected to a plurality of distributed computers in which a monitor computer connected via a network to the distributed computers... |
| 5970149 |
Combined remote access and security system |
| Oct-19-1999 |
A combined remote access and security system for servicing a secure mainframe central processing unit having a console monitor. A secure dispatch central processing unit for receiving problem reports concerning... |
| 5966443 |
Method for correcting subscriber-based secure call keys |
| Oct-12-1999 |
A key variable correction scheme allows errored encryption key material in mobile and portables radios to be quickly identified and corrected. The errored encryption material can be corrected automatically... |
| 5963641 |
Device and method for examining, verifying, correcting and approving electronic documents prior to printing, transmission or recording |
| Oct-5-1999 |
Disclosed is a software implemented device and method for examining, verifying, correcting and approving electronically-recorded documents, prior to their final output, whether printing, transmission or... |
| 5926547 |
Method and apparatus for providing program/component redundancy in headend |
| Jul-20-1999 |
In a communications system, a headend is provided with redundancy circuitry for video receivers, decoders, and modulation circuitry. The devices in the headend are monitored for failure, and when they... |
| 5917909 |
System for testing the authenticity of a data carrier |
| Jun-29-1999 |
A system for testing the authenticity of a data carrier determines the physical property of the data carrier from an irreversibly adjustable electric state of a circuit present separately on the integrated... |
| 5903654 |
Method and apparatus for eliminating ionospheric delay error in global positioning system signals |
| May-11-1999 |
A method and apparatus for determining and removing the error in the SPS measurement of the Global Positioning System due to ionospheric delay. The disclosed technique utilizes semi-codeless technique... |
| 5889864 |
Data transmission systems |
| Mar-30-1999 |
In a data transmission system in which a cyclic redundancy checksum value is derived in respect of each block of data bit values to be transmitted over the system, the checksum value in respect of blocks... |
| 5870469 |
Method for testing the intactness of stored data in a processing facility for sheet material such as bank notes or papers of value |
| Feb-9-1999 |
For testing the intactness of stored data, intact data corresponding to the data to be tested from a component of the processing facility in a certain operating state of the processing facility in the... |
| 5864624 |
Method for activating and executing protected functions in a communication system |
| Jan-26-1999 |
In a communication system having a function or performance feature to be protected, the periodic transmission of encoded interrogation information is initiated by a security routine to ensure that the... |
| 5815571 |
Computer system with secured data paths and method of protection |
| Sep-29-1998 |
A computer system with secured data paths consists of a main computer with a main processor, associated main memory, main input/output devices, and main data paths interconnecting the main processor, main... |
| 5805711 |
Method of improving the security of postage meter machines |
| Sep-8-1998 |
A method for securing data and program code of an electronic postage meter machine against manipulation, having a microprocessor in a control unit of the postage meter machine for implementing steps for... |
| 5793866 |
Communication method and device |
| Aug-11-1998 |
A system (100) and method of improving activation security allows a remote device (104) to identify that there is a difference between a first signal transmitted by a central site (102) and a first signal... |
| 5790662 |
Data carrier and write/read device therefor |
| Aug-4-1998 |
A data carrier with an electronic circuit for storing and processing data is provided with an information strip with optically readable markings, and preferably a test field and an authentication feature.... |
| 5787173 |
Cryptographic key management method and apparatus |
| Jul-28-1998 |
A system for the secure communication of a message from a transmitting user to a receiving user using a split key scheme. Each user generates a key component using a cryptographic engine. The key component... |
| 5768380 |
Method for sending a communication unit parameter to a plurality of communication units |
| Jun-16-1998 |
In a wireless communication system (100), a communication unit parameter is sent to a plurality of communication units (105-108) during a first period of time using either a group update method or an individual... |
| 5761312 |
Enhanced individual intelligent communication platform for subscribers on a telephone system |
| Jun-2-1998 |
A multiple function individual intelligent communication platform is disclosed which supports the subscriber at the subscriber's location. Tremendous functionality is incorporated into a single system... |
| 5761308 |
System for refunding payment for software |
| Jun-2-1998 |
There is provided a system for refunding payment for software applied to a software distribution system comprising at least one user terminal and a center. The center notifys the user terminal of the deciphering... |
| 5708713 |
Method for monitoring a signal to be transmitted via at least one telecommunication link, a monitoring system, a monitor controlling device and processing means |
| Jan-13-1998 |
Prior art methods used for monitoring, via monitoring means, signals which are to be transmitted via telecommunication links and with said signals each comprising a signalling signal and a content signal,... |
| 5652662 |
Communications apparatus wherein transmission of ciphered data is dependent upon available memory |
| Jul-29-1997 |
In transmitting enciphered data, to enable an ECM communication, whether a cipher communication is performed or not can be decided according to an available memory capacity. To perform the cipher communication,... |
| 5638449 |
Data transmission installation of the radio network type, and corresponding process |
| Jun-10-1997 |
A method of data transmission for a data transmission system which includes at least two data processing stations, each of the data processing stations being equipped with a network interface configured... |
| 5638442 |
Method for remotely inspecting a postage meter |
| Jun-10-1997 |
The postage meter terminal has the ability to telecommunicate with a remote central computer for the principal purpose of remotely resetting the funding registers of the postage meter terminal. During... |
| 5631960 |
Autotest of encryption algorithms in embedded secure encryption devices |
| May-20-1997 |
An internal state machine controller in an integrated circuit containing a cryptographic implementation independently tests and verifies each of the encryption and decryption algorithms and modes within... |
| 5623545 |
Automatic data generation for self-test of cryptographic hash algorithms in personal security devices |
| Apr-22-1997 |
According to the present invention, the solution includes the hardware hash algorithm block to automatically generate data to hash from its initialization values and to run unassisted instead of needing... |
| 5615261 |
Method and apparatus for detecting illicit RF data transmissions |
| Mar-25-1997 |
Detection of illicit radio frequency (RF) data transmissions is accomplished by employing an RF security monitor (120) positioned within the transmission range of a wireless communication system (101).... |
| 5608798 |
Crytographic device with secure testing function |
| Mar-4-1997 |
A method of securely testing a cryptographic device need not be carried out in a secure testing facility by cleared personnel. First, a test cycle total count number is provided. Then, for each of a plurality... |
| 5602990 |
Computer system diagnostic testing using hardware abstraction |
| Feb-11-1997 |
A user-initiated diagnostic test of a computer system is performed using a hardware abstraction layer including a diagnostic subsystem file and a diagnostic definition file, and also using diagnostic control... |
