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7376232 |
Computer system security via dynamic encryption
A dynamic computer system security method and system using dynamic encryption and full synchronization between system nodes. A data record from a data stream created by a source user is encrypted...
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7373517 |
System and method for encrypting and decrypting files
A system and method distribute the task of decryption between a server and a client. To encrypt data, the client generates an encryption/decryption key. Namely, a user interface obtains a password,...
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7372960 |
Method and apparatus for performing finite field calculations
In general terms, the invention provides a finite field engine and methods for operating on elements in a finite field. The finite field engine provides finite field sub-engines suitable for any...
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7372961 |
Method of public key generation
A potential bias in the generation or a private key is avoided by selecting the key and comparing it against the system parameters. If a predetermined condition is attained it is accepted. If not...
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7370196 |
Controlled-content recoverable blinded certificates
In a cryptographic system, a certificate is used to provide information regarding a client device. The certificate is blindly signed by a certifying authority to preserve the anonymity of the...
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7370202 |
Security device for cryptographic communications
Cryptographic systems and methods are provided in which authentication operations, digital signature operations, and encryption operations may be performed. Authentication operations may be...
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7366302 |
Apparatus and method for an iterative cryptographic block
A method and apparatus for an iterative cryptographic block under the control of a CPU and without a fixed number of stages. In one embodiment, a first cryptographic block descrambles received...
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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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7363326 |
Archive with timestamps and deletion management
A method by which a disk-based distributed data storage system is organized for protecting historical records of stored data entities. The method comprises recording distinct states of an entity,...
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7362869 |
Method of distributing a public key
A method of distributing the public key of an asymmetric key pair with a private key and the public key from a mobile station to a key managing computer, the method include the steps of:...
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7359509 |
Method and system for generation of cryptographic keys and the like
A method, and deterministic random bit generator system operating in accordance with the method, for generating cryptographic keys and similar secret cryptographic inputs which are hard to guess. A...
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7356140 |
Encrypting device, decrypting device, cryptosystem including the same devices, encrypting method, and decrypting method
A cryptosystem includes an encrypting device, a communication path, and a decrypting arithmetic device. Key generation means in the encrypting device generate a public key {g 1 , g 2 } as random...
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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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7346161 |
Method and apparatus for designing cipher logic, and a computer product
An optimization processing unit optimizes an input and output bit number of an S-box based on parameters inputted from an input unit. The examples of the parameters are memory capacity of a primary...
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7346162 |
Public key cryptography using matrices
The invention provides techniques for secure messages transmission using a public key system to exchange secret keys. A first entity creates public and private keys by generating a product n of two...
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7343493 |
Encrypted file system using TCPA
A method for restricting access to an encryption key of an encrypted file system (EFS), whereby access is provided only when a computer system is booted in a trusted state. The EFS encrypts the...
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7340055 |
Memory card and data distribution system using it
A memory card ( 110 ) conducts an authentication process with a server based on data stored in an authentication data hold unit ( 1400 ). The memory card ( 110 ) extracts a first session key (Ks 1...
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7333608 |
Analog scrambler
An analog signal scrambler/de-scrambler includes a receiver for receiving an analog signal and converting the signal into an intermediate frequency signal. A generator generates a pseudo-random...
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7333617 |
Method for establishing a common key for a group of at least three subscribers
A method for establishing a common key for a group of at least three subscribers includes using a publicly known mathematical number group and a higher order element of the group gεG. In the first...
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7330653 |
Quantum dense coding system
A Quantum Dense Coding System. The system includes a source, a transmitter and a receiver. The source is capable of down-converting a pump photon into a signal photon and an idler photon and...
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7330972 |
Remote management device key administration using network adapters
According to some embodiments, network adapters may be used in remote management device key administration.
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7330549 |
Method of producing a cryptographic unit for an asymmetric cryptography system using a discrete logarithm function
The invention relates to a group of public-key cryptography schemas that use the discrete logarithm problem with the purpose of reducing the cost of developing, producing and maintaining a...
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7328342 |
Method for secure communication between two devices
A method for a secure transmission of information between a first and a second module is disclosed. Each module contains one of the keys of two pairs of keys. A first number and a second number are...
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7324648 |
Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site
Rather than downloading each content document on demand from the publisher location to the user site, at the publisher location, each content document is encrypted and then multiple encrypted...
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7321660 |
Method and apparatus for encrypting/decrypting data using timed-release keys
A computer system comprises a first computer entity arranged to encrypt data using an encryption key comprising a time value, and a second computer entity arranged to generate, at intervals, a...
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7319758 |
Electronic device with encryption/decryption cells
In an electronic component including a two-way bus through which data elements travel between peripherals and a central processing unit at the rate of a clock signal, the central processing unit...
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7319752 |
Information recording device, information playback device, information recording method, information playback method, and information recording medium and program providing medium used therewith
An information recording/playback device stores beforehand, on a recording medium, secret information in which a writing/reading method thereof cannot be analyzed and which can be read only by a...
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7319759 |
Producing a new black box for a digital rights management (DRM) system
A new ((n)th) black box is produced for a digital rights management (DRM) system. The (n)th black box is for being installed in and for performing decryption and encryption functions in the DRM...
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7317795 |
Pipelined deciphering round keys generation
An apparatus is equipped with a deciphering round key generator to successively generate in real time at least a first and a second deciphering round key based on a deciphering key, and a...
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7317799 |
Cryptographic key distribution using key folding
Methods, computer-readable media, and apparati for securely distributing a cryptographic key (C) from a first party(s) to a second party(s). A method embodiment of the present invention comprises...
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7313238 |
Method and system for relating cryptographic keys
A method and system for relating cryptographic keys. A method includes providing to a user a private share related to a key. The method also includes generating a new key based on a previous...
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7308097 |
Digital signature and authentication method and apparatus
A method, system and apparatus for performing user identification, digital signatures and other secure communication functions in which keys are chosen essentially at random from a large set of...
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7308575 |
Data scrambling system for a shared transmission media
Methods of providing added security for communications between a server and a particular client modem on a shared communication media. The methods provide for passing communications containing...
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7308583 |
Data distribution system
Each of a plurality of contents supply systems connected to a single user apparatus uses a group management method that employs flexible and unique tree structures. A manager in each contents...
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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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7305548 |
Using atomic messaging to increase the security of transferring data across a network
A client sends a request to an authentication server requesting access to a service at an application server. The authentication server returns a token containing an encrypted version of a session...
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7302572 |
Portable information storage medium and its authentication method
Authentification data (R) comprising random numbers generated by a reader/writer ( 200 ) is given to an IC card ( 100 ), encrypted by utilizing a secret key (a), and returned as encryption data...
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7302583 |
Biometrics template
Methods of storing and decrypting biometrics templates on a terminal network are described. A biometrics template 14 is encrypted 18 using a key 16 , and the key 16 is then divided into a...
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7298842 |
Utilizing a key for enciphering and deciphering that is modified during enciphering and deciphering
The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with...
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7299253 |
System and method for efficient basis conversion
This invention describes a method for evaluating a polynomial in an extension field F q M , wherein the method comprises the steps of partitioning the polynomial into a plurality of parts, each...
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7299354 |
Method to authenticate clients and hosts to provide secure network boot
A method for authenticating clients and boot server hosts to provide a secure network boot environment. Messages are exchanged between a client and a boot server or authentication server proxy for...
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7295671 |
Advanced encryption standard (AES) hardware cryptographic engine
A cryptographic method and related implements the Rijndael—AES encryption standard. In one improvement, the decryption round keys are generated on a round by round basis from the final Nk round...
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7290137 |
Information processing apparatus, executable module generating method, and storage medium
In order to protect against unauthorized duplication of a library file, or the like, according to the present invention, an executable module is generated. The executable module is generated by...
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7290144 |
Access-control method for software modules and programmable electronic device therefor
A programmable electronic device ( 10 ) stores a number of cipher-text software modules ( 14 ) to which access is granted after evaluating a user's token ( 55, 80, 82 ), a software-restriction...
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7284134 |
ID installable LSI, secret key installation method, LSI test method, and LSI development method
In an LSI, a decoding section decodes an ID signal received externally and outputs the decoded signal. A fuse circuit writes the value represented by the decoded signal therein when an operation...
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7283804 |
Method of controlling a network entity and a mobile station
A network entity and the mobile station are adapted to conduct a plurality of predetermined message exchange procedures, including encryption key generation procedures. The method comprises...
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7283629 |
Deriving keys used to securely process electronic messages
A plurality of message processors exchange public and secret information. Based on the exchanged information, each message processor computes a key sequence such that any one of a plurality of keys...
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7283632 |
Unauthorized access embedded software protection system
An operational system ( 10 ) includes a seed-bearing device ( 12 ) that has a seed ( 22 ). A key-determinative device ( 14 ) determines a key in response to the seed ( 22 ). A code-determinative...
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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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7278016 |
Encryption/decryption of stored data using non-accessible, unique encryption key
Encryption and decryption of data stored from a computing system to a storage medium is disclosed wherein the processing employs a non-accessible encryption key that is unique to the computing...
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