Matches 501 - 550 out of 734 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
6169804 Method for verifying the expected postage security device and its status  
A secure and reliable method for verifying in the host system that the expected PSD is coupled to the host system includes generating a random number in the host system and encrypting the random...
6154541 Method and apparatus for a robust high-speed cryptosystem  
A cryptographic information and communication system of the knapsack type characterized by secret logical segregation of the key sets into sections by different construction methods, where...
6144743 Information recording medium, recording apparatus, information transmission system, and decryption apparatus  
In the invention, an information recording medium records encrypted information, encrypted key information obtained by encrypting key information for decrypting the encrypted information to obtain...
6141422 Secure cryptographic multi-exponentiation method and coprocessor subsystem  
A system for performing high speed exponentiation in a secure environment. The system includes an interface for receiving encrypted data sent from a host system, a plurality of exponentiators...
6137885 Method for enabling direct encrypted communication between two terminals of a mobile radio network, and corresponding station and terminal facilities  
A method for enabling encrypted communication to be performed directly in a single hop or merely directly between two terminals of a mobile radio network by satellite and/or of the GSM/DCS type,...
6128387 Method and system for using a non-inversible transform and dynamic keys to protect firmware  
The present invention discloses a method and system to encrypt an object code using a non-inversible transform and dynamic keys in an encryption circuit and an decryption circuit. The encryption...
6118869 System and method for PLD bitstream encryption  
A decryption scheme is provided for encrypted configuration bitstreams in a programmable logic device. One embodiment includes circuitry for altering a decryption key for a plurality of encrypted...
6104810 Pseudorandom number generator with backup and restoration capability  
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...
6097814 Method and apparatus for controlling the reproduction of data stored on a storage medium method  
Plural program information and a BCA (Burst Cutting Area) number of the optical disc (100) is previously recorded in the optical disc (100). A drive ID is stored in the nonvolatile memory (104a) of...
6094572 Method of generating a random number from a radio signal  
A method of generating a random number is disclosed for forming an identification code used for mutual identification between a base station and a mobile telephone. The method includes receiving a...
6088797 Tamper-proof electronic processing device  
A system for open electronic commerce having a customer trusted agent securely communicating with a first money module, and a merchant trusted agent securely communicating with a second money...
6081598 Cryptographic system and method with fast decryption  
A cryptography system improves the decryption speed in the RSA algorithm by taking advantage of certain subgroups of Z n *. The cryptography system employs a new family of trapdoor permutations...
6078667 Generating unique and unpredictable values  
An integer for a private key is generated utilising a pair of components that are combined in a fixed predictable manner. The first component is generated from a sequencer such as a counter that...
6064740 Method and apparatus for masking modulo exponentiation calculations in an integrated circuit  
Circuitry which performs modular mathematics to solve the equation C=M k mod n and n is performed in a manner to mask the exponent k's signature from timing or power monitoring attacks. The...
6064738 Method for encrypting and decrypting data using chaotic maps  
The present invention features a method for encrypting and decrypting large amounts of data such as images. A simple two-dimensional map is first generalized by the introduction of parameters. The...
6052466 Encryption of data packets using a sequence of private keys generated from a public key exchange  
A first cipher stream generated from a private key negotiated as a result of a public key exchange is partitioned to form a sequence of secondary keys. The secondary keys are then indexed. In one...
6049612 File encryption method and system  
A file security system is disclosed in which both a deterministic, non-predictable, pseudo-random, symmetric encryption key and an encrypted information file are highly resistant to cryptographic...
6049611 One-way data conversion apparatus and device authentication system  
The verifier apparatus 50 includes a random number generation unit 51 that generates a 2n-bit random number, a separator unit 52 that separates the random number into two sets of n-bit data, a data...
6047068 Method for determining an encryption key associated with an integrated circuit  
A method and an apparatus for determining an encryption key associated with an integrated circuit having a memory plane that includes a matrix of electric contacts on it's surface and a layer of...
6038316 Method and system for protection of digital information  
An information processing system including an encryption processing logic module and a decryption processing logic module for enabling the encryption of digital information to be decrypted with a...
6038320 Computer security key  
A computer security key provides security to a computer which includes a computer bus. The computer is programmed to function with the security key. The security key includes a connector that is...
6031913 Apparatus and method for secure communication based on channel characteristics  
Characteristics of a communication channel are used to establish key sequences for use in encrypting communicated information. In one embodiment, these characteristics are the impedances of the...
6031912 Process and device for permitting selective access to a security system  
A process and arrangement that gives selective access to a security system, particularly in a payment system using debit cards, credit cards, or withdrawal of funds contained in a so-called smart...
6028935 Cryptographic receiver  
A cryptographic receiver (10) includes photon detectors (52, 54, 56, 58) arranged to detect photons arriving from filters (22) and (24). A fiber coupler (14) randomly distributes each received...
6002770 Method for secure data transmission between remote stations  
A method for permitting the secure handling of data between two remote stations firstly involves the generation of an encrypted decryption key which is based on a fingerprint information signal...
5995533 Apparatus and method for generating pseudorandom quantities based upon radio channel characteristics  
Characteristics of the radio channel are used to establish pseudorandom sequences for use in communicating information. These characteristics are the short-term reciprocity and rapid spatial...
5995623 Information processing apparatus with a software protecting function  
The present invention provides an information processing apparatus which comprises separating means for separating inputted data into identification data and data to be encrypted, determination...
5991408 Identification and security using biometric measurements  
The present invention makes it possible for a user to have a security key created from one or more biometric elements of the user, such as a fingerprint. For example, a biometric feature or...
5987139 Method for encryption of information  
The method involves modifying an encryption key (Kc) in accordance with a given algorithm and in dependence on the ordinal number of a time slot to obtain a modified encryption key. A modified...
5987124 Method and apparatus for encrypting long blocks using a short-block encryption procedure  
A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext...
5987130 Simiplified secure swift cryptographic key exchange  
A first of two cryptographic units establish a cryptographic key "K" by initially selecting a first quantity "A", and computes second and third quantities "B"=Φ 1 (A) and "C"=Φ 2 (A). It must...
5966444 Method and system for establishing a cryptographic key agreement using linear protocols  
A method for establishing key agreement between two communicating parties using a general linear protocol in finite and infinite dimensional spaces. Two topological linear spaces, in particular...
5966224 Secure communications with low-orbit spacecraft using quantum cryptography  
Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and...
5966449 Method and network for communicating between a group of entities a text encrypted using an encryption key intrinsic to the group of entities in a network having a plurality of entities and a center  
In a network having a plurality of entities and a center, the center creates random numbers for all the combinations of two of the entities within the network, and delivers to each entity random...
5960086 Unified end-to-end security methods and systems for operating on insecure networks  
Secure transmission of a message is achieved by using a one-time encryption key derived at the receiver and the sender from information present at both the sender and the receiver, but wherein the...
5956409 Secure application of seals  
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...
5956402 Passwordless secure and efficient remote data update  
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...
5953420 Method and apparatus for establishing an authenticated shared secret value between a pair of users  
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...
5940508 Method and apparatus for seamless crypto rekey system  
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...
5940002 Security system with random number remote communication  
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...
5937067 Apparatus and method for local encryption control of a global transport data stream  
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...
5933502 Method and apparatus for enhancing the integrity of visual authentication  
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...
5923754 Copy protection for recorded media  
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...
5920630 Method of public key cryptography that includes key escrow  
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...
5917914 DVD data descrambler for host interface and MPEG interface  
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...
5917910 Encrypting method and apparatus, recording method, decrypting method and apparatus, and recording medium  
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...
5915025 Data processing apparatus with software protecting functions  
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...
5912973 Method for scrambling and/or descrambling FM subcarrier data  
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...
5890075 Method for remotely updating data stored in a mobile terminal by a wireless telecommunications system  
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...
5881153 Remote keyless entry encryption algorithm  
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....
Matches 501 - 550 out of 734 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >