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7617397 |
Systems and methods for generation and validation of isogeny-based signatures
Techniques are described for generating and validating signatures. In an implementation, a method includes generating a signature by utilizing a plurality of isogenies included on a private key and...
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7613302 |
Systems and methods for compression of key sets having multiple keys
Systems, methods and modulated data signals are described herein that provide an efficient way to derive a single key from which a user can extract virtually any number of data encryption keys. A...
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7609834 |
Personal authenticating multi-function peripheral
A method and apparatus of printing a document in a secure manner, includes receiving, by a printer, print data that has been encrypted using a printer public key. The printer-public-key-encrypted...
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7607019 |
Small memory footprint fast elliptic encryption
A method of generating a digital signature includes generating a first random number from a finite field of numbers, and generating field elements defining a first point on an elliptic curve...
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7606388 |
Contents border detection apparatus, monitoring method, and contents location detection method and program and storage medium therefor
A contents border detection apparatus and monitoring method. The apparatus comprises a digital watermark detector for detecting a digital watermark embedded in contents for which a time element is...
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7603560 |
Method and apparatus for digital signature authentication
The present invention improves speed and reduces complexity in a digital signature scheme that uses elliptic algebra. The signature scheme generates two points that are compared. If the points do...
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7602907 |
Elliptic curve point multiplication
Systems and methods configured for recoding an odd integer and elliptic curve point multiplication are disclosed, having general utility and also specific application to elliptic curve point...
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7599890 |
Content data storage
A memory card ( 110 ) includes a memory ( 1415 ) to store encrypted content data, a license hold unit ( 1440 ) to store at least a portion of license information distributed by a distribution...
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7599491 |
Method for strengthening the implementation of ECDSA against power analysis
A method of inhibiting the disclosure of confidential information through power analysis attacks on processors in cryptographic systems. The method masks a cryptographic operation using a generator...
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7596689 |
Secure and reliable document delivery using routing lists
An operations center (OC) ( 200 ) acts as an intermediary for securely and reliably transmitting a document ( 3 ) from a sender ( 100 ) to a next recipient ( 300 ) on a routing list. The OC ( 200 )...
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7594261 |
Cryptographic applications of the Cartier pairing
Systems and methods for cryptographically processing data as a function of a Cartier pairing are described. In one aspect, a Cartier pairing is generated from two different abelian varieties or...
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7594116 |
Mediated key exchange between source and target of communication
A system for communicating a message securely between a sender and a receiver. The sender provides a key server with a string specifying the receiver. The key server obtains a message key and a...
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7593527 |
Providing digital signature and public key based on shared knowledge
A public key and digital signature is provided using a private key of a public-private key pair in an elliptic curve digital signature algorithm (ECDSA) by: identifying domain parameters of an...
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7593526 |
Method and apparatus for compressing rabin signatures
A method and apparatus are disclosed for compressing Rabin signatures. The disclosed compression scheme compresses a Rabin signature, s, for a user having a public key, n, based on a continued...
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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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7590235 |
Reduction calculations in elliptic curve cryptography
An Elliptic Curve Cryptography reduction technique uses a prime number having a first section of Most Significant Word “1” states, with N=n m-1 +N 1 B+n 0 and a second section with a plurality...
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7587605 |
Cryptographic pairing-based short signature generation and verification
In at least one implementation, described herein, P and Q 1 , . . . , Q n are public points on an elliptic curve over a finite field, but the ratios of Q i to P are private. Those ratios are the...
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7587600 |
Loading data onto an electronic device
A method of protecting an electronic device from unauthorized reprogramming, the electronic device comprising a data memory and a key memory, the method comprising loading into the key memory a...
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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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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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7570759 |
System and method for secure encryption
A method for encrypting a message containing a plurality of message segments is described. First, a key is input into a SHA function to generate a first hash value. Then, a first message segment is...
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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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7564971 |
Apparatus and method for performing Montgomery type modular multiplication
A signal processing apparatus for performing modular multiplication for use in a signal processing system includes a first logic for outputting a signed multiplicand by selectively performing a...
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7562229 |
Codeword-based auditing of computer systems and methods therefor
A computer-implemented method in a computer system for facilitating auditing of the computer system is disclosed. The method includes receiving a request for a codeword from a user of the computer...
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7562052 |
Secure customer communication method and system
The method for creating communication encryption keys for use over a communications channel comprises the steps of: selecting a code number for a user or web browser; selecting the two highest...
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7555646 |
Efficient implementation of zero knowledge protocols
An efficient implementation of zero knowledge protocols for authentication of devices and for identification of devices connecting to a network. According to one aspect, the present invention...
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7555122 |
Method for elliptic curve point multiplication
The method comprises three stages. In the first stage, randomly selected point representations are stored in variables. In the second stage, a right-to-left loop is executed that modifies the...
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7555121 |
Methods and apparatus for implementing a cryptography engine
Methods and apparatus are provided for implementing a cryptography engine for cryptography processing. A variety of techniques are described. A cryptography engine such as a DES engine running at a...
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7552329 |
Masked digital signatures
The present invention relates to digital signature operations using public key schemes in a secure communications system and in particular for use with processors having limited computing power...
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7552322 |
Using a portable security token to facilitate public key certification for devices in a network
One embodiment of the present invention provides a system that uses a portable security token to facilitate public key certification for a target device in a network. During system operation, the...
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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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7551056 |
Use-authorization device for security-related applications
This description is given of a use-authorization device for security-related applications, in particular access control to secure areas or securing vehicles with a user operated key unit for...
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7549172 |
Data processing apparatus for digital copyrights management
Data processing apparatus distributes a public key certificate and information about a private key to a user terminal as activation information separately from a terminal module. In the case where...
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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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7545928 |
Triple DES critical timing path improvement
Improved security processing circuits are discussed which may be used alone or as part of a network interface device of a host system using a DES engine to accomplish 3DES processing. The security...
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7541920 |
Alarm/event encryption in an industrial environment
Systems and methods that can enhance protection of alarms and events within an industrial control environment are provided. An alarm security component employs cryptographic mechanisms and...
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7536011 |
Tamper-proof elliptic encryption with private key
An encryption device performs elliptic curve encryption using a secret key. The encryption device includes an operation unit for performing scalar multiplication of a point on an elliptic curve a...
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7532720 |
Utilizing SIMD instructions within montgomery multiplication
An architecture and methodology for implementing Montgomery multiplication on a computer system that supports SIMD instructions is described.
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7529926 |
Public key certification providing apparatus
A host communicates with a gateway, a DHCP server or a PPP peer of ISP to determine an IPv6 address, also receives a public key certificate from the gateway, the DHCP server or the PPP peer of ISP,...
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RE40708 |
Dual encryption protocol for scalable secure group communication
A logical tree structure and method for managing membership in a multicast group provides scalability and security from internal attacks. The structure defines key groups and subgroups, with each...
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7525202 |
Quantum computational systems
Apparatus and methods for performing quantum computations are disclosed. Such quantum computational systems may include quantum computers, quantum cryptography systems, quantum information...
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7522723 |
Password self encryption method and system and encryption by keys generated from personal secret information
A public key cryptographic system and method is provided for a password or any other predefined personal secret information that defeats key factoring and spoofing attacks. The method adopts a new...
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7512800 |
Key management technique for establishing a secure channel
A key management technique establishes a secure channel through an indeterminate number of nodes in a network. The technique comprises enrolling a smart card with a unique key per smart card. The...
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7512233 |
Method and apparatus for computing a shared secret key
A method of generating a key by a first correspondent. The key is computable by a second correspondent. The method comprises the steps of:
a) making available to the second correspondent a...
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7512230 |
Method and apparatus of fast modular reduction
Methods and apparatus reduce the computational load for computing r=x mod n, given two numbers x and n, where x is 2t bits long and n is t bits long. Such reduced computational loading in modular...
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7509492 |
Distributed scalable cryptographic access control
Published resources are made available in an encrypted form, using corresponding resource keys, published through resource key files, with the publications effectively restricted to authorized peer...
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7509292 |
Authentication of consumable items
This invention concerns a consumable authentication method for validating the existence of an untrusted chip. A random number is encrypted using a first key and sent to an untrusted chip. In the...
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7509250 |
Hardware key control of debug interface
In one embodiment, a system comprises debug functionality, a debug interface communicatively coupled to the debug functionality, and a hardware key interface. Communication with the debug...
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