| 5956409 |
Secure application of seals |
| Sep-21-1999 |
The invention provides a method of and system for secure application of seals. An optical image of a seal is recorded by a computer and encrypted using a key for encryption generated in response to template... |
| 5956402 |
Passwordless secure and efficient remote data update |
| Sep-21-1999 |
Secure communication is effected when computers A and B that are interconnected by an insecure medium employ a dataset that is known to both and that is otherwise used within one or other of the computers... |
| 5953420 |
Method and apparatus for establishing an authenticated shared secret value between a pair of users |
| Sep-14-1999 |
A method and apparatus for generating authenticated Diffie-Hellman keys. Each user first generates an authenticated first shared secret value from a first nonshared persistent secret value generated by... |
| 5940508 |
Method and apparatus for seamless crypto rekey system |
| Aug-17-1999 |
Equipment (10, 20) for facilitating point-to-point cryptographic data communication systems is disclosed. The seamless rekey cryptosystem permits changing of the crypto key (70, 80) with no down time.... |
| 5940002 |
Security system with random number remote communication |
| Aug-17-1999 |
A security system that is useful for protecting vehicles from theft and buildings from unauthorized entry, for example, includes utilizing random numbers within remotely transmitted signals. A remote signaling... |
| 5937067 |
Apparatus and method for local encryption control of a global transport data stream |
| Aug-10-1999 |
An encryption control system to process an input transport data stream into an output transport data stream includes an input demultiplexer, a first secure microprocessor, a second secure microprocessor... |
| 5933502 |
Method and apparatus for enhancing the integrity of visual authentication |
| Aug-3-1999 |
A method and apparatus in accordance with the present invention, in response to a request for access to a secure resource, modulates an illumination light source, such as a computer display, in a pseudo-random... |
| 5923754 |
Copy protection for recorded media |
| Jul-13-1999 |
A method and apparatus for securely transferring an encrypted-data key and a medium key, from a media storage such as a DVD disk to an output device in a computer system, using a randomly generated first... |
| 5920630 |
Method of public key cryptography that includes key escrow |
| Jul-6-1999 |
A key escrow encryption method, where two users each have secret encryption keys and corresponding public encryption keys. One user receives the public encryption keys of the other user and generates a... |
| 5917914 |
DVD data descrambler for host interface and MPEG interface |
| Jun-29-1999 |
A descrambler for a Digital Versatile Disk (DVD) is provided within a DVD controller to allow for real-time descrambling of DVD data from the DVD buffer. The built-in descrambler also allows the controller... |
| 5917910 |
Encrypting method and apparatus, recording method, decrypting method and apparatus, and recording medium |
| Jun-29-1999 |
When information to be recorded is encrypted by using an encryption key, an encryption key based on inherent information inherent in a recording medium is generated. The information to be recorded on the... |
| 5915025 |
Data processing apparatus with software protecting functions |
| Jun-22-1999 |
A data processing apparatus with software protecting functions capable of enhancing the level of encryption security independently of the memory management method of the system comprising the apparatus.... |
| 5912973 |
Method for scrambling and/or descrambling FM subcarrier data |
| Jun-15-1999 |
An FM multiple radio broadcasting receiver includes a data group number and data packet number derivation circuit by which a data group number and a data packet number included in a prefix of FM subcarrier... |
| 5890075 |
Method for remotely updating data stored in a mobile terminal by a wireless telecommunications system |
| Mar-30-1999 |
A method for automatically updating shared secret data stored in a mobile terminal comprises initiating a shared secret data update procedure upon receipt of an access attempt by a mobile terminal in a... |
| 5881155 |
Security device for a semiconductor chip |
| Mar-9-1999 |
Security device for preventing access to confidential information stored in a semiconductor chip, or protected chip. The security device comprises a second semiconductor chip, or protective chip, with... |
| 5881153 |
Remote keyless entry encryption algorithm |
| Mar-9-1999 |
The present invention teaches a method and system of encrypting a set of data having a test bit. The method comprises the step of generating a first and a second data string from the set of data. Once... |
| 5875247 |
System for decrypting encrypted software |
| Feb-23-1999 |
A CD-ROM stores encrypted software. When a user desires to decrypt and install this software, an approval preparatory key is generated by an installer. This approval preparatory key is generated based... |
| 5850448 |
Programmed computer for generating pronounceable security passwords |
| Dec-15-1998 |
A programmed computer for forming a pronounceable security password, includes storage medium having a plurality of first and second word segment portions stored thereon. Each second word segment portion... |
| 5850441 |
System and method for key distribution using quantum cryptography |
| Dec-15-1998 |
A method of communication based on quantum cryptography is modified to include an initial step of outputting from, e.g., a transmitter, a single-photon signal, which may be unmodulated. A receiver then... |
| 5848160 |
Digital synthesized wideband noise-like waveform |
| Dec-8-1998 |
Apparatus and a method for generating a digital synthesized Gaussian noise-like waveform that may be used to modulate and demodulate communication data. The present invention uses a seed input that addresses... |
| 5841873 |
Methods of detecting decryption errors |
| Nov-24-1998 |
In a data communications system, including an infrastructure arranged to communicate over a data channel with a plurality of data terminals, a method of detecting data decryption errors in a data packet... |
| 5841864 |
Apparatus and method for authentication and session key exchange in a communication system |
| Nov-24-1998 |
The apparatus (101, 110) and method for authentication is provided by generating R and encrypting it using a selected algorithm K as the key in a primary station, encrypting the verification key, V using... |
| 5835600 |
Block encryption algorithm with data-dependent rotations |
| Nov-10-1998 |
A simple encryption and decryption device has been developed. The underlying algorithm is a fast block cipher that may be implemented efficiently in hardware or software. The algorithm makes heavy use... |
| 5832091 |
Fingerprint controlled public key cryptographic system |
| Nov-3-1998 |
A public key cryptographic system is implemented as follows. In an enrolment apparatus, the unique number for use in generating the public key and private key of the system is generated by manipulation... |
| 5832087 |
Apparatus for generating encryption/decryption look-up tables using a session key |
| Nov-3-1998 |
An encryption/decryption apparatus enables encrypted communication between two stations each incorporating such an apparatus. The apparatus is arranged to generate a set of look-up tables in accordance... |
| 5809148 |
Decryption of retransmitted data in an encrypted communication system |
| Sep-15-1998 |
The method generally includes the steps of receiving (201) a message (100) comprising a message indicator (101) and a plurality of encrypted blocks (103 through 111). When at least one block of the plurality... |
| 5809147 |
Device for cryptographically processing data packets and method of generating cryptographic processing data |
| Sep-15-1998 |
A device for encrypting or decrypting data packets. The device includes two cryptographic elements. The first cryptographic element generates processing data, based on a first starting value, for use in... |
| 5809140 |
Session key distribution using smart cards |
| Sep-15-1998 |
Methods and apparatus are disclosed for providing secure session key distribution using a smart circuit card or other intelligent device. First and second hosts communicate with each other and with a server... |
| 5805712 |
Apparatus and method for providing secured communications |
| Sep-8-1998 |
A semiconductor device used to store encryption/decryption keys at manufacture in combination with digital certificates to ensure secured communications between the semiconductor device and another device.... |
| 5802175 |
Computer file backup encryption system and method |
| Sep-1-1998 |
A system and method for generating, storing and retrieving cryptographic keys to be utilized in a processor-based system. In one embodiment, a Touch Memory ("TM") containing unique information is used... |
| 5799090 |
pad encryption method and software |
| Aug-25-1998 |
A pad encryption software architecture includes space on a floppy for storing the pad to be used with the encryption software. The pad is XOR generated with random numbers subject to redetermined offsets.... |
| 5796840 |
Apparatus and method for providing secured communications |
| Aug-18-1998 |
A method of producing a hardware agent being a single integrated circuit encapsulated within a semiconductor device package. The method comprises the steps of generating a device-specific key pair internally... |
| 5796839 |
Encryption method, encryption apparatus, recording method, decoding method, decoding apparatus and recording medium |
| Aug-18-1998 |
There are provided an encryption method, an encryption apparatus, a recording method, a decoding method, a decoding apparatus and a recording medium in which encryption keys can be managed with ease by... |
| 5796833 |
Public key sterilization |
| Aug-18-1998 |
A public key sterilization scheme for thwarting possible attacks based on choosing malicious public keys. A first user sends public key information to a certificate authority. The certificate authority... |
| 5768390 |
Cryptographic system with masking |
| Jun-16-1998 |
A system for cryptographically transforming a sequence of input blocks of plaintext or ciphertext data into corresponding sequence of output blocks of data while providing enhanced protection against cryptographic... |
| 5764771 |
Method for processing a digital signal in a so-called secure communication system and use of this method for access control and/or binary signature |
| Jun-9-1998 |
The present invention relates to a method of processing a digital signal of dimension k, in a so-called secure communication system, such that the digital signal (y) at output cannot be deduced from the... |
| 5760700 |
Security system with succession of codes |
| Jun-2-1998 |
The security system involved in the arming and disarming of a car alarm, includes a transmitter and a receiver. Both transmitter and receiver includes oscillators incorporating a highly accurate and stable... |
| 5751808 |
Multi-purpose high speed cryptographically secure sequence generator based on zeta-one-way functions |
| May-12-1998 |
A method is disclosed whereby a high performance, high integrity, cryptographically secure sequence generator based on zeta one-way functions is specified for pseudorandom sequence generation, authentication,... |
| 5748734 |
Circuit and method for generating cryptographic keys |
| May-5-1998 |
A circuit for, and method of, generating a cryptographic key at a communications node. The circuit includes: (1) communications circuitry for communicating a first seed during a first communications session... |
| 5745578 |
Apparatus and method for secure communication based on channel characteristics |
| Apr-28-1998 |
A method and an apparatus for establishing a key sequence for secure communication through a communication channel between a first transceiver and a second transceiver. Each transceiver transmits to the... |
| 5740249 |
Encryption apparatus and method capable of controlling encryption process in accordance with an internal state |
| Apr-14-1998 |
An encryption apparatus is constituted by a plurality of rungs of round functions. Each round function comprises internal state storing means for storing an internal state, internal state updating means... |
| 5734720 |
System and method for providing digital communications between a head end and a set top terminal |
| Mar-31-1998 |
A system and method for scheduling the receipt of desired movies and other forms of data from a network. Feedback paths are provided so that customer's profiles and/or the profiles of the video programs... |
| 5729609 |
Method for producing a common key in two devices, in order to implement a common cryptographic procedure, and associated apparatus |
| Mar-17-1998 |
The invention relates to a method and an apparatus for producing a key that is common to two devices that belong to different sets and are intended to implement a common cryptographic procedure. Each device... |
| 5727065 |
Deferred billing, broadcast, electronic document distribution system and method |
| Mar-10-1998 |
An electronic document delivery system and method in which a broadcast center periodically sends a "catalog" of available documents to a receiving computer, thereby allowing a user to browse through the... |
| 5724426 |
Apparatus and method for controlling access to and interconnection of computer system resources |
| Mar-3-1998 |
A compact, physically secure, high-performance access controller (16, 18) is electrically connected to each access-managed resource (12, 14) or group of resources (10) in a computer system. Whenever access... |
| 5720034 |
Method for secure key production |
| Feb-17-1998 |
A method for exchanging a secure slave key between an agent and a manager which are connected by an unsecured digital computer network. A master key is provided, which is known to both the manager and... |
| 5712912 |
Method and apparatus for securely handling a personal identification number or cryptographic key using biometric techniques |
| Jan-27-1998 |
A method and apparatus using biometric information (such as a fingerprint, an iris structure, etc.) as a cipher for encrypting and decrypting a personal identification number (PIN) which is used as an... |
| 5712800 |
Broadcast key distribution apparatus and method using chinese remainder |
| Jan-27-1998 |
A communication system utilizing low bandwidth requirements for transmitting an encoded value formulated using the Chinese Remainder procedure to receivers having a private key. The system offers the advantages... |
| 5703952 |
Method and apparatus for generating a cipher stream |
| Dec-30-1997 |
A system for encrypting or decrypting a digital message comprising a linear driving subsystem (4) for generating a pseudo random data sequence, a non-linear feedback subsystem (6) for producing a cipher... |
| 5680460 |
Biometric controlled key generation |
| Oct-21-1997 |
A key generation system is implemented as follows. In an enrolment apparatus, a unique number for use with PIN operated machines or public key cryptography systems is generated by manipulation of fingerprint... |
