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7606361 |
Sending a message securely over an insecure channel
Sending a message securely on an insecure channel. The message is encoded in the form of a singular matrix, and multiplied with a first non-singular matrix. The resulting first cipher data is sent...
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7600121 |
Message security
To provide a secure, effective but simple message handling, a method is provided for transmitting an electrical message, from a first user having a first terminal to a second user having a second...
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7581100 |
Key generation method for communication session encryption and authentication system
An interactive mutual authentication protocol, which does not allow shared secrets to pass through untrusted communication media, integrates an encryption key management system into the...
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7567672 |
Cryptographic communication system
In a cryptographic communication system, a prover is connected through a channel to a verifier. Elements a, b, c, d of a finite group are used as a public key and a parameter “x” as a private...
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7561689 |
Generating keys having one of a number of key sizes
An apparatus is disclosed for generating keys having one of a number of key sizes. Memory sections of a memory element are adapted to store a portion of a key. The memory element has a size at...
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7551737 |
Cryptographic keys using random numbers instead of random primes
A system and method for providing cryptographic keys which are usable in a network of connected computer nodes applying a signature scheme. The method employs: generating a random secret key usable...
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7542570 |
Information encryption transmission/reception method
An information encrypting transmission and reception method in an information transmission and reception network composed of a plurality of senders and receivers having computers being connected...
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7536014 |
Apparatus and method for generating scrambling code in UMTS mobile communication system
A scrambling code generating apparatus of a downlink transmitter in a UMTS mobile communication system, which uses one primary scrambling code for separation of base stations and multiple secondary...
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7526087 |
Random number generator
A random number generator. The random number generator includes a noise source, a circuit controlling random current consumption, and a circuit generating random bits. A noise voltage output from...
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7493429 |
Communication of information via a side-band channel, and use of same to verify positional relationship
The present invention provides for trusted side-band communications between components in a computer system, so that use of the system bus may be avoided. Two components may be connected by means...
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7457411 |
Information security via dynamic encryption with hash function
A system and method providing secure information. An encryption key is regenerated by performing byte addition of an encryption key, encrypted data, and a hash vector based upon an encryption key....
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7451316 |
Method and system for pre-authentication
A wireless station prepares to roam by pre-authenticating itself with a neighboring access point. The wireless station sends a rekey request, which can include an incremented rekey number. The...
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7434054 |
Asynchronous enhanced shared secret provisioning protocol
An Asynchronous Enhanced Shared Secret Provisioning Protocol (ESSPP) provides a novel method and system for adding devices to a network in a secure manner. A registration process is launched by at...
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7418736 |
Network security system
Security is provided in a network system. A message is received from a user, which message requires authentication of the user. An authentication message is sent indicating the identity of the user...
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7406175 |
Key generator device, encoding/decoding device, and key generation method
Disclosed is a key generator, which assures the security of a key by preventing a circuit designer and other persons from readily knowing the value of the key. Random number generator circuits (...
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7403619 |
Interface module and decoder for host
The present invention relates to an interface module for a host ( 2 ) such as a digital television decoder, permitting the processing of information coming from the host ( 2 ) in a conditioned...
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7392995 |
Driving device for wheels
A driving device for a wheelbarrow includes a motor assembly which has a shaft and a driving gear is connected to the shaft. The driving gear is engaged with planet gears of a gear set to drive a...
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7386131 |
Tolerant digital certificate distribute system and distribute method
A digital certificate issuing system with intrusion tolerance ability and the issuing method thereof are disclosed. The system comprises an offline secret key distributor, at least one online task...
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7362863 |
DES hardware throughput for short operations
A symmetric key cryptographic method is provided for short operations. The method includes batching a plurality of operation parameters ( 1503 ), and performing an operation according to a...
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7350077 |
802.11 using a compressed reassociation exchange to facilitate fast handoff
A method and system for handling roaming mobile nodes in a wireless network. The system uses a Subnet Context Manager to store current Network session keys, security policy and duration of the...
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7349545 |
Key agreement method in secure communication system using multiple access method
A key agreement method for secure communication in a multiple access system is provided. A key agreement method for secure communication in a multiple access system, the key agreement method...
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7308104 |
Forward multiple scrambling code generating method and apparatus
Disclosed are a forward multiple scrambling code generating method and apparatus in a communication system. Each base station uses primary scrambling codes and an associated one of secondary...
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7280659 |
Pseudorandom number generating apparatus or encryption or decryption apparatus using the same
In a buffer and a state included in a pseudorandom number generating apparatus, the state has the configuration of assuming that the unit length of data processing is n, the state has a size of...
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7269736 |
Distributed cryptographic methods and arrangements
First and second computing devices are selectively operatively coupled together. The first device provides data to the second device. The second device can be a portable computing device. The...
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7260215 |
Method for encryption in an un-trusted environment
A method and apparatus for secure distribution of information over a network, comprising: encrypting payload information using a first encryption key in a first data processor; sending the payload...
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7248692 |
Method of and apparatus for determining a key pair and for generating RSA keys
In a method of determining a pair of numbers comprising a first number and a second number, in which the first number may be a first key and the second number may be a second key of an encryption...
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7248691 |
Hashing using multiple sub-hashes
A hashing structure including multiple sub-hashes is used to determine whether an input value matches one or more of multiple target values. These values can be of any form, such as security...
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7236593 |
Apparatus for encryption and decryption, capable of use in encryption and decryption of advanced encryption standard
An apparatus for encryption and decryption, capable of use in encryption and decryption of advanced encryption standard. Byte substitution operation and inverse byte substitution operation are to...
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7227956 |
Simple encrypted transmission system suitable for intermittent signals
A signal transmitted from a first device to a second device is encrypted using an encryption key generated from a preceding part of the signal itself. The signal is decrypted in the second device...
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7212633 |
Expansion key generating device, encryption device and encryption system
An expansion key generating device that receives encryption key data as input, and outputs plural expansion key data, comprising: a data dividing unit operable to divide the encryption key data...
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7212632 |
Cryptographic key split combiner
A cryptographic key split combiner, which includes a number of key split generators for generating cryptographic key splits and a key split randomizer for randomizing the cryptographic key splits...
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7191155 |
License transmitting and distributing system under offline environment and method thereof
An LA (License Agent) (or a license chip having the same function as the LA) is disposed in a PC (Personal Computer), a content distribution server, and a medium attached to a PD (Private Device or...
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7165180 |
Monolithic semiconductor device for preventing external access to an encryption key
A monolithic semiconductor device having an encryption engine and encryption key register to store one or more encryption keys, where the contents of the encryption key register are observable, or...
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7149308 |
Cryptographic communications using in situ generated cryptographic keys for conditional access
A system and method for cryptographic communication among multiple users and a central service provider using in situ generated cryptographic keys. Each user communicates with the central service...
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7120798 |
System and method for the generation and verification of signatures associated with hardcopy documents
A system generates and verifies signatures on hardcopy documents. A signor key is associated with a signor of a hardcopy document. A document signature is generated using the signor key to encode...
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7120696 |
Cryptographic communications using pseudo-randomly generated cryptography keys
An apparatus and method for generating pseudo-random cryptographic keys in a cryptographic communications system, whereby, given a common set of initializing configuration data, the pseudo-random...
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7120248 |
Multiple prime number generation using a parallel prime number search algorithm
A process is provided for searching in parallel for a plurality of prime number values simultaneously includes the steps of: randomly generating a plurality of k random odd numbers (wherein k is...
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7095850 |
Encryption method and apparatus with forward secrecy and random-access key updating method
An encryption method and apparatus that provides forward secrecy, by updating the key using a one-way function after each encryption. By providing forward secrecy within a cipher, rather than...
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7079653 |
Cryptographic key split binding process and apparatus
A cryptographic key split combiner includes a number of key split generators for generating cryptographic key splits from seed data, and a key split randomizer for randomizing the key splits to...
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7051202 |
Apparatus and computer-recording medium for evaluation support of encryption algorithm strength
An encryption evaluation support system, includes an evaluation executing unit, and a point storing unit. The evaluation executing unit receives a figure representation of an encryption algorithm....
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7043016 |
Substitution-box for symmetric-key ciphers
An input data block is cryptographically converted into an output data block; by performing a non-linear operation on the input data block using an S-box based on permutations. The S-box is...
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7035408 |
Method to generate pseudo-random sequence of multi-carrier data symbols, and related transmitter and receiver
To generate a pseudo-random sequence (PRMS 1 ) of multi-carrier data symbols (DMT 0 , DMT 1 , DMT 2 ), a pseudo-random bit sequence (PRBS 1 ) is produced by repetitively generating a pseudo-random...
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7023990 |
Secure parameter generating device and parameter generating method in algebraic curve crytography
The Stickelberger element computing device computes a Stickelberger element ω in an ab cyclotomic; the Jacobian addition candidate value computing device computes the Jacobian addition candidate...
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7020287 |
Method and system for key insertion for stored encrypted content
An encrypted content transport stream is received by a viewer's device and recorded for subsequent playback. During recording, keys in headers of packets of the stream are stripped and placed in...
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7016494 |
Multiple cryptographic key precompute and store
A method and apparatus provides cryptographic parameters for use in cryptographic applications in response to requests therefor. The method includes the steps of: pre-computing one or more...
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7003109 |
Compact crypto-engine for random number and stream cipher generation
A compact dual function Random Number Generator and Stream Cipher Generator includes a Crypto-engine has a controller for controlling the engine to operate in one or other of its functions. The...
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7000111 |
Method for masking secret multiplicands
A mobile terminal for use in a mobile communications system includes a SIM card storing subscriber related data. For security, the SIM card performs secret cryptographic calculations with secret...
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6990200 |
Encryption method, cryptographic communication method, ciphertext generating device and cryptographic communication system of public-key cryptosystem
Two public keys including a random number term therein are prepared in a database for each divided plaintext in advance, a plaintext is divided into a plurality of 1-bit divided plaintexts, one...
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6961427 |
Methods and apparatus for keystream generation
Methods and apparatus for the generation of a cryptographic one way function (a key or keystream generator) for use in encrypting or decrypting binary data. A non-linear key or keystream generation...
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6961426 |
Cascaded stream cipher
A pseudo-random number generating circuit and method, comprising: a plurality of pseudo-random number generator (PRNG) units combined in a cascade structure of several layers to produce a...
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