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7007164 |
Method and array for authenticating a first instance and a second instance
In order to authenticate a first entity at a second entity, a first number is generated by way of an asymmetric cryptographic method. This first number is symmetrically encoded and transmitted to...
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7003501 |
Method for preventing fraudulent use of credit cards and credit card information, and for preventing unauthorized access to restricted physical and virtual sites
A method and a system for enabling secure authentication of a user in a computerized card access transaction. A card, identified by an identification number is issued to the user, containing...
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7000110 |
One-way function generation method, one-way function value generation device, proving device, authentication method, and authentication device
Without the need to store and manage a private unique value of a hash function for each token, and without the fear of organizational private information of a center being revealed, a hash function...
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6993136 |
Cryptographic key exchange method using efficient elliptic curve
A method of exchanging a cryptographic key between two users that includes the steps of selecting a value p from p=(2 dk −2 ck −1)/r, p=(2 dk −2 (d−1)k +2 (d−2)k − . . . −2 k +1)/r,...
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6986044 |
Method for group unit encryption/decryption, and method and apparatus for writing signature
The invention is to provide a group lock which is used in group units for encryption, decryption, and signature. A public key, private key, and common key are provided and the private key is...
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6986054 |
Attack-resistant implementation method
The present invention makes it difficult for unauthorized parties to estimate processing and a secret key based upon the waveforms of power consumption of an IC card chip by changing a processing...
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6978018 |
Technique to support co-location and certification of executable content from a pre-boot space into an operating system runtime environment
Techniques to support co-location and certification of executable content from a pre-boot space into an operating system kernel mode runtime environment. The invention enables platform firmware...
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6978016 |
Circuits for calculating modular multiplicative inverse
The modular exponentiation function used in public key encryption and decryption systems is implemented in a standalone engine having at its core modular multiplication circuits which operate in...
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6977745 |
Method and apparatus for the secure printing of a document
A method for securely controlling the printing of a plaintext document generated by a first source includes the steps of receiving at a printer via a first communication channel a first key sent by...
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6978017 |
Method and system for providing updated encryption key pairs and digital signature key pairs in a public key system
An adaptable cryptographic method and system provides updated digital signature key pairs in a public key system by providing, through a multi-client manager unit, selectable expiry data such as...
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6978372 |
Verification of correct exponentiation or other operations in cryptographic applications
The correctness of an exponentiation operation or other type of operation associated with a multi-party cryptographic protocol is verified using first and second proofs based on a randomized...
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6975725 |
Method for standardizing the use of ISO 7816 smart cards in conditional access systems
A conditional access system and method are disclosed allowing the use of a standard smart card. A computing resource configured to run the conditional access protocol has a smart card interface and...
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6971030 |
System and method for maintaining user security features
A security server is provided to maintain security profiles for many customers. Customers are authenticated to the security server using a secret identifier, such as a password, or a digital...
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6970562 |
System and method for crypto-key generation and use in cryptosystem
A first processor generates a private crypto-key and a public crypto-key. The first processor divides the private crypto-key into two portions, a first private key portion, based upon a user's...
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6968058 |
Digital evidential camera system for generating alteration detection data using built-in encryption key
A digital evidential camera system is for detecting the alteration of image data obtained by photographing an object. The system comprises the camera and an alteration detection unit. The camera...
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6965998 |
Time stamping method using time-based signature key
A time-stamping protocol for time-stamping digital documents uses a time-based signature key. A document or other identifying data is sent to a time stamping authority TSA. The TSA has a time-based...
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6965997 |
System and method for binding and unbinding ticket items with user-negotiated security features
A customer wants to transfer an electronic ticket that includes customer security features to another person, he requests that the merchant unbind the security features from the ticket identifier....
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6963644 |
Multi-word arithmetic device for faster computation of cryptosystem calculations
A multi-word arithmetic device, capable of executing a variety of types of multi-word arithmetic required for elliptic curve cryptology, includes the following. A memory 40 , formed from two...
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6963979 |
Cryptographic accelerator
A cryptographic accelerator ( 1 ) has a host interface ( 2 ) for interfacing with a host sending cryptographic requests and receiving results. A CPU ( 3 ) manages the internal logical unit in an...
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6963645 |
Method for implementing the chinese remainder theorem
The modular exponentiation function used in public key encryption and decryption systems is implemented in a standalone engine having at its core modular multiplication circuits which operate in...
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6959085 |
Secure user identification based on ring homomorphisms
A method for authenticating, by a second user, the identity of a first user, that includes a challenge communication from the second user to the first user, a response communication from the first...
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6959086 |
Cryptographic key management scheme
A key management scheme for managing encryption keys in a cryptographic co-processor includes the first step of selecting a key from one of a symmetrical key type and an asymmetrical key type....
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6956946 |
Method and device for cryptographic processing with the aid of an elliptic curve on a computer
In the case of cryptographic processing with the aid of an elliptic curve, parameters of the elliptic curve are stored in a memory of a computer. These parameters are each of substantial length....
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6957329 |
System for encrypting data from multiple multimedia applications and method thereof
Methods and systems are provided for encrypting data from a plurality of multimedia devices. A driver initiates authentication for the plurality of multimedia applications. The driver assigns a key...
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6954854 |
Electronic authentication method, electronic authentication apparatus and electronic authentication storage medium
According to the invention, techniques for verifying that data input as a response to presented contents is true input data for a content access. In a representative embodiment according to the...
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6954740 |
Action verification system using central verification authority
Architecture for central e-commerce authorization and verification using multiple Keys/Pins storage and central action verification means. Action Verification is provided between Action Initiating...
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6952475 |
Method and arrangement for the computer-aided exchange of cryptographic keys between a first computer unit and a second computer unit
The invention relates to a method which can be used to declare a session key (K) between a first computer unit (U) and a second computer unit (N) without it being possible for an unauthorized third...
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6952476 |
Verification of the private components of a public-key cryptographic system
A method of exchanging digital public-key verification data whereby a first computing entity ( 102 ) enables a second computing entity ( 104 ) to obtain probabilistic evidence that a given...
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6950517 |
Efficient encryption and authentication for data processing systems
Methods and apparatus are presented herein for encrypting and authentication data, such that some of data can be transmitted in the clear but still be authenticated by the sender. A set of...
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6948069 |
Method and system for determining and maintaining trust in digital image files with certifiable time
A system and methods for proving dates of digital-imaging files, which are accessed, created, modified, received, saved, or transmitted by a computer includes a trusted time source in a tamperproof...
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6947557 |
Method and program product for maintaining security of publicly distributed information
A method and computer program product for selectively making information available to groups of parties amongst a plurality of parties. Public keys that may be descriptive, such as a simple name or...
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6944765 |
Method of authentication anonymous users while reducing potential for “middleman” fraud
A method of authenticating anonymous users while reducing potential for “middleman” fraud includes the step of constructing a puzzle in response to information received from a software user....
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6940980 |
High security cryptosystem
A network device represents a user having a predefined associated password, a predefined associated symmetric crypto-key and a predefined associated asymmetric crypto-key, including a first private...
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6937726 |
System and method for protecting data files by periodically refreshing a decryption key
Methods for transferring among key holders in encoding and cryptographic systems the right to decode and decrypt messages in a way that does not explicitly reveal decoding and decrypting keys used...
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6931126 |
Non malleable encryption method and apparatus using key-encryption keys and digital signature
A fast encryption method particularly useful for long message lengths is provided. A message m is encrypted using a transmitter secret key z to form a quantity E. A transmitter processor prepares a...
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6931482 |
Semiconductor memory device internally provided with logic circuit which can be readily controlled and controlling method thereof
If a region designated by an address signal is a logic control region, an interface portion transmits/receives data to/from a register instead of a DRAM. A data signal used at that time is a...
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6928163 |
Methods, systems and computer program products for generating user-dependent RSA values without storing seeds
Methods, systems and computer program products are provided which allow for generation and authentication of RSA encrypted values by utilizing a combination of entity specific information such as...
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6925489 |
Methods and apparatus for identification and purchase of broadcast digital music and other types of information
Identification information is extracted from a current broadcast of a piece or music or other type of information of interest to a user, and stored in a memory or other storage device, in response...
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6922774 |
Device for and method of secure computing using virtual machines
A device for and method of secure computing that includes a computer system having a processor; an operating-system software program loaded onto the processor; a type-II virtual machine monitor...
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6918041 |
System and method of network communication with client-forced authentication
A client-forced authentication mechanism for network communication enables a client to choose to “force” the establishment of an authenticated connection with a server that supports both...
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6914985 |
Method and system for presentation and manipulation of PKCS enveloped-data objects
A method and system for processing enveloped data objects in a data processing system. The enveloped data object may be formatted as defined by PKCS (Public Key Cryptography Standard) standards. An...
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6914986 |
Countermeasure method in an electronic component using a public key cryptography algorithm on an elliptic curve
The present invention concerns a countermeasure method in an electronic component using a public key cryptography algorithm based on the use of elliptic curves. From a private key d and a number of...
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6910129 |
Remote authentication based on exchanging signals representing biometrics information
A method, an apparatus, and a computer program product for remote authentication are disclosed. The methods are based on exchanging of signals representing remote party's biometrics information...
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6907127 |
Hierarchical key management encoding and decoding
The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for...
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6904150 |
Cryptographic method and system for double encryption of messages
A method and system for encrypting and decrypting a message. A message is created by appending an error detection code to an information block. The binary value of the resulting message is then...
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6904524 |
Method and apparatus for providing human readable signature with digital signature
Using know methods a digital signature, such as a one-way hash, of a document is produced. A digital representation of a signature is associated with the digital signature. The digital...
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6901513 |
Process for generating a digital signature and process for checking the signature
A method for generating a digital signature s of a message m using a secret key including at least two large prime numbers p, q is provided. It is provided that s is the zero of the polynomial...
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6898284 |
Cryptographic identification and digital signature method using efficient elliptic curve
A method of identifying user, generating digital signature, and verifying digital signature by selecting a modulus p in the form of p=(2 dk −2 ck −1)/r, p=(2 dk −2 (d−1)k +2 (d−2)k − ....
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6895506 |
Secure storage and execution of processor control programs by encryption and a program loader/decryption mechanism
A method and a mechanism for securely storing and executing a program in a computer system processing unit, including a storage unit for storing an encrypted version of the program and a...
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6888944 |
Method for assigning encryption keys
Sets of encryption keys useful by devices for decrypting encrypted content are defined using an error-correcting code such as a Reed-Solomon code to define vectors of length “n” over an...
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