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7620806 |
Encrypted communication for selectively delivering a message to multiple decrypting devices
Reduces message length of encrypted message to be transmitted selectively to plurality of decrypting devices. An encrypting device includes a generating unit for generating node associating...
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7620182 |
QKD with classical bit encryption
A method for enhancing the security of a quantum key distribution (QKD) system having QKD stations Alice and Bob. The method includes encrypting key bits generated by a true random number generator...
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7616765 |
Method and system for generating shared information
A sender sends original random-number data to a receiver through a quantum channel. The receiver generates a raw key from information received through the quantum channel and notifies the received...
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7615735 |
Random number generation using a scattering waveguide
The present invention provides a method and apparatus for random number generation using a scattering waveguide. The apparatus includes a light source for providing coherent light and a scattering...
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7613297 |
Method and apparatus for data encryption
A method and apparatus for use in encrypting and decrypting digital communications converting an initial block to final block based on freely selectable control information and secret key...
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7609839 |
Quantum key distribution method and communication device
In order to create a highly-secured common key while a data error on a transmission path is corrected by an error correction code having remarkably high characteristics, in a quantum key...
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7606371 |
Two-way QKD system with active compensation
A two-way actively stabilized QKD system that utilizes control signals and quantum signals is disclosed. Because the quantum signals do not traverse the same optical path through the system, signal...
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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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7602911 |
Method and system for enhancing cryptography-based security
As part of a cryptographic protocol, or in addition to it, a computer may participate in a cryptographic key generation protocol. The cryptographic key generation protocol may be such that it...
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7602910 |
Password protection
Systems and methods for password protection are described. In one aspect, an asymmetric key pair is deterministically formed by combining a password and other data. The public key of the asymmetric...
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7599493 |
Asymmetric key pair having a kiosk mode
Techniques for providing different levels of access based upon a same authentication factor are provided. A first message is received that is transformed with a first portion of a split private...
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7596697 |
Technique for providing multiple levels of security
Techniques for authentication are provided. A first authentication request transformed with a private portion of a first type split private key is received. A first user is authenticated for a...
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7596695 |
Application-based data encryption system and method thereof
An application-based data encryption method implemented in an operating system. When receiving system calls for writing data opened by an application, the operating system encrypts the data...
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7596223 |
User control of a secure wireless computer network
A wireless network is established between a station and an access point for the network using a sequence of messages that securely transmit authentication information from the station to the access...
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7593717 |
Authenticating access to a wireless local area network based on security value(s) associated with a cellular system
A method is provided for determining a private key for a first network based on at least one security value associated with a second network. The method further includes establishing a plurality of...
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7590865 |
Method and apparatus for restriction use of storage medium using user key
A method and apparatus for restricting the use of a disc are provided. In this method, first, lead-in data is read out from a loaded disc. Then, a user key is read out from a lead-in area of the...
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7590591 |
Electronic value exchange system and electronic value exchange method
When a portable terminal receives a condition for an exchange object from a portable terminal, it selects electronic values as exchange objects, out of lists constituting the condition. An IC card...
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7590409 |
Communications system, communications apparatus, and communication method
A communication system, a communication apparatus, and a communication method are provided. A communications apparatus includes a generation unit for generating a transmission message sent to a...
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7590236 |
Identity-based-encryption system
Systems and methods for supporting symmetric-bilinear-map and asymmetric-bilinear-map identity-based-encryption (IBE) key exchange and encryption schemes are provided. IBE key exchange schemes use...
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7587764 |
Cryptic information and behavior generation for competitive environments
An invention was developed to improve the performance and survivability of units in a competitive environment. Cryptic Command, Control, and Planning, and Management increases to apparent...
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7587607 |
Attesting to platform configuration
Receiving a request for an attestation of platform configuration from an attestation requestor, receiving an acceptable configuration, and if the platform matches the acceptable configuration,...
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7587049 |
Active stabilization of a one-way QKD system
A one-way stabilized QKD system ( 10 ) that utilizes a control signal (CS) and a quantum signal (QS) that travel the same path through the system from a first QKD station (Alice) to a second QKD...
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7587046 |
Method and apparatus for generating keystream
A method and apparatus for generating a keystream are provided. The method includes: (a) receiving a bitstream comprised of at least 4 bits; (b) selecting at least two bits from the received...
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7587045 |
System and method for securing document transmittal
The present invention is directed to a system and method for secure transmission of electronic document data on a network. The method begins with the receipt of user identification data associated...
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7584363 |
Fair blind signature process
In a fair blind signature process, a user interacts with a signer in order to complete a 7-tuple (A,e,s,t,x u ,x,m) such that A e =a 0 a 1 x a 2 m a 3 x u a 4 t a 5 s (mod n), where a 0 , a 1 , a...
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7584362 |
Systems and methods for providing signatures
Systems and methods for providing signatures are described. In an implementation, a system includes a backend configured to generate a plurality of incomplete signatures using an offline portion of...
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7584198 |
Data storage
A method of storing a data set on a storage device carrying a file of random data comprising the steps of: selecting, in dependence on a user input passphrase, a first location within the file of...
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7581243 |
Secure communication method, terminal device, authentication server, computer program, and computer-readable recording medium
A secure communication method is performed in a system including a terminal device and an authentication server. The terminal device has at least one service process supplying a service to other...
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7581108 |
Method and system for generating time-based identifiers
Methods and systems for generating time-based identifiers that are used for identifying items is described. In one embodiment, a master key is assigned to an electronic tag. Time-based other keys...
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7580521 |
Identity-based-encryption system with hidden public key attributes
A system is provided that uses identity-based encryption (IBE) to allow a sender to securely convey information in a message to a recipient over a communications network. IBE public key information...
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7577851 |
Multitask execution apparatus and multitask execution method
A multitask execution system executes a plurality of tasks in parallel. The multitask execution system includes an encryption processor configured to generate a key stream unique to each task, by...
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7577250 |
Key derivation functions to enhance security
Key derivation algorithms are disclosed. In one key derivation application, a segment of the master key is hashed. Two numbers of derived from another segment of the master key. A universal hash...
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7574600 |
System and method for combining user and platform authentication in negotiated channel security protocols
A security protocol for combining user and platform authentication. The security protocol includes a first handshake phase to issue attestation identity credentials, and a second handshake phase to...
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7571320 |
Circuit and method for providing secure communications between devices
An electronic system and method for providing secure communications between devices. The secure communications are maintained through use of an integrity check value (ICV) that accompanies a...
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7571315 |
Method and apparatus to assign trust to a key
A method includes determining whether a key is traceable to one of a set of keys associated with a trusted source and determining whether the key is identified in a list of compromised keys. If 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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7567669 |
Strengthened public key protocol
A method of determining the integrity of a message exchanged between a pair of correspondents. The message is secured by embodying the message in a function of a public key derived from a private...
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7565539 |
Method and apparatus for secure communications
A method of managing a key for encrypted communication over a communication link between first and second modems, each modem having respective first and second master keys. A first key material for...
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7565531 |
Locking programming interface
A locking programming interface (LPI) which prevents piracy of device-related user software. An LPI Code is generated from a variety of different parameters, including a software product ID, a...
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7565527 |
Technique for asymmetric crypto-key generation
Techniques for generating a multi-factor asymmetric key pair having a public key and split private key with multiple private portions, at least one of the multiple portions being a multiple factor...
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7562218 |
Method, system and device for authenticating a user
Preferred embodiments of the invention relate to a method and device for authenticating a user of a computer and a corresponding system using the method and device. The device is a handheld...
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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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7558387 |
Gathering randomness in a wireless smart card reader
A device coupled to a smart card reader may request random data from a smart card inserted into the smart card reader, and the smart card reader may incorporate the random data into its randomness...
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7555127 |
Quantum cryptography key distribution system and method
In a quantum cryptography key distribution system for sharing a secret key between a transmitter and a receiver site, an unbalanced interferometer system in the transmitter site has a Mach-Zehnder...
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7552343 |
Conditional access control
The invention relates to a secure data processing system including an unscrambling module [DSC] disposed on a dedicated hardware part [HW] of an integrated circuit and intended to unscramble a...
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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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7548618 |
Converter, encryption/decryption system, multi-stage converter, converting method, multi-stage converting method, program, and information recording medium
A converter uses a predetermined parameter a. A generating unit accepts generated inputs x 1 , . . . , x n , and generates generated outputs, y 1 , . . . , y n , using recurrence formulas, y 1 =F 1...
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7545943 |
Apparatus, method, and computer program product for playing back content
A content playback apparatus includes an SKF selecting unit that selects one segment key file from plural segment key files recorded in a DVD media at a time of playback of a content of the...
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7545933 |
Decryption circuit, encryption circuit, logic cell, and method of performing a dual-rail logic operation in single-rail logic environment
A decryption circuit for generating a decrypted data signal and a complementary decrypted data signal from a key. In addition, a means for performing a linkage specification so as to generate the...
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7545932 |
Secure authenticated channel
A protocol (i.e. method) and corresponding apparatuses for calculating a session key. Two peers with knowledge of a common Diffie-Hellman permanent key, K perm , and the identity and public key of...
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