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| Number | Title | Issue Date |
| 6587949 | Secure storage device for transfer of data via removable storage A secure storage device with the identical external dimensions, form factor and hardware connectivity configuration of a standard removable storage device, for securing digital data such as digital images from digital cameras at the acquisition stage. Ori... | 07/01/2003 |
| 6564319 | Technique for compressing digital certificates for use in smart cards A technique for compressing certificate information for use in portable credit instruments having limited storage capacity. An end user certificate typically actually comprises a chain of certificates, as SET transactions require not only the end user cer... | 05/13/2003 |
| 6550010 | Method and apparatus for a unit locked against use until unlocked and/or activated on a selected network Methods and apparatus to provide for a unit that is locked against use for communications until the unit is unlocked and that may be activated on a selected network in conjunction with the unit being unlocked. A unit includes a memory for storing an unloc... | 04/15/2003 |
| 6532540 | Apparatus and method for demonstrating and confirming the status of a digital certificates and other data Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list. According to one computer-implemented method, the items on the list are sorted and ranges are derived from adjacent pairs of d... | 03/11/2003 |
| 6490357 | Method and apparatus for generating encryption stream ciphers A method and an apparatus for generating encryption stream ciphers are based on a recurrence relation designed to operate over finite fields larger than GF(2). A non-linear output can be obtained by using one or a combination of non-linear processes to fo... | 12/03/2002 |
| 6487658 | Efficient certificate revocation We propose new systems for certificate revocation that are more economical and efficient than traditional ones. We also point out what we believe to be a structural problem in traditional public-key infrastructures, and various ways to solve it.... | 11/26/2002 |
| 6480608 | Method for exchanging cryptographic keys in an ATM network using multiple virtual paths or circuits In an Asynchronous Transfer Mode telecommunications network having a plurality of virtual paths or circuits, an encryption key used for data transmitted between a source and a receiver may be updated, the data being transmitted initially using a first enc... | 11/12/2002 |
| 6466671 | Smartcard for use with a receiver of encrypted broadcast signals, and receiver A smartcard for use with a receiver of encrypted broadcast signals comprises a microprocessor for enabling or controlling decryption of said signals. A memory is coupled to the microprocessor. The microprocessor is adapted to enable or control the individ... | 10/15/2002 |
| 6445794 | System and method for synchronizing one time pad encryption keys for secure communication and access control A method for generating an identical electronic one-time pad at a first location and a second location, the method comprising the steps of: (a) providing a first electronic device at the first location and a second electronic device at the second location... | 09/03/2002 |
| 6442692 | Security method and apparatus employing authentication by keystroke dynamics A device for verifying the identity of an individual based on a typing characteristic token. The device having said device embedded in a keyboard, said keyboard in communication with an a processing system to be secured, said device comprising: an input m... | 08/27/2002 |
| 6442690 | Apparatus and methods for managing key material in heterogeneous cryptographic assets Apparatus and methods for remotely rekeying a cryptographic device are disclosed. A method according to the invention includes associating a preliminary certificate with the device, generating a device certificate associated with the device, determining w... | 08/27/2002 |
| 6442688 | Method and apparatus for obtaining status of public key certificate updates A method and apparatus for public key certificate updates is accomplished when a user of a secured communications system provides, from time to time, a public key certificate update subscription update to a server. The public key certificate update subscr... | 08/27/2002 |
| 6434701 | System and method for digitally marking a file A system enables encoding of a removable mark into digital data, and decoding of the mark from the digital data. The system comprises an encoder and a decoder. The encoder includes a target area locator for locating in the digital data a flat area having ... | 08/13/2002 |
| 6405315 | Decentralized remotely encrypted file system A decentralized file system based on a network of remotely encrypted storage devices is disclosed. The file system includes a network to which a network client, a secure remotely encrypted storage device, a key manager, and a lock manager are attached. Th... | 06/11/2002 |
| 6381695 | Encryption system with time-dependent decryption An object of the invention is to provide an encryption system and method for inhibiting the decryption of encrypted data unless a decryption condition is satisfied. Thus, according to the present invention, in order to provide the encryption system for in... | 04/30/2002 |
| 6363151 | Method and system for subscriber authentification and/or encryption of items of information Security parameters (SPAR) are provided by the mobile radiotelephone network (PLMN) for subscribers of another network (CN) via an interface (DSS1+) connecting the two networks, without carrying out subscriber entries in at least one subscriber database o... | 03/26/2002 |
| 6351811 | Systems and methods for preventing transmission of compromised data in a computer network Systems and methods for controlling the transmission of data in a computer network; specifically, systems and methods related to preventing the transmission of compromised data. In one embodiment, a web server is configured to transmit requested data to a... | 02/26/2002 |
| 6339827 | Method for securing sensitive data in a LDAP directory service utilizing a client and/or server control The lightweight directory access protocol (LDAP) is extended to include client- and server-based controls for securing sensitive data in the directory service. The set of controls include a client control implemented on a client machine, and/or a server c... | 01/15/2002 |
| 6337912 | Method of and system for writing-in key information In order to unambiguously allocate a data carrier to an object, key information is written into the data carrier. Before writing-in the key information, secret identification information and open identification information is written into the data carrier... | 01/08/2002 |
| 6324286 | DES cipher processor for full duplex interleaving encryption/decryption service A full duplex DES cipher processor (DCP) supports to execute sixteen rounds of data encryption standard (DES) operation in four encryption modes and four decryption modes, namely: Electronic Code Book (ECB) mode, Cipher Block Chaining (CBC) mode, Cipher F... | 11/27/2001 |
| 6317830 | Process and device for authenticating subscribers to digital exchanges A device for authenticating subscribers to one or more exchanges of a digital communication network having at least one subscriber-side network terminator, to which at least one data terminal may be connected. It is a distinction of the invention that pro... | 11/13/2001 |
| 6311271 | How to sign digital streams A method of signing digital streams so that a receiver of the stream can authenticate and consume the stream at the same rate which the stream is being sent to the receiver. More specifically, this invention involves computing and verifying a single digit... | 10/30/2001 |
| 6298135 | Method of preventing power analysis attacks on microelectronic assemblies Apparatus in form of a microelectronic assembly including an integrated circuit (IC) for execution of an embedded modular exponentiation program utilizing a square-and-multiply algorithm, wherein in the modular exponentiation program a secret exponent hav... | 10/02/2001 |
| 6292897 | Undeniable certificates for digital signature verification A signer uses an undeniable signature scheme to sign his public key to thereby create an "undeniable certificate" which can be used to verify the signer's digital signature on any message signed using the signer's corresponding private key. Hence, once th... | 09/18/2001 |
| 6266418 | Encryption and authentication methods and apparatus for securing telephone communications An encryption device for a telephone having a handset and a base unit is disclosed. The device includes a handset interface, a first converter, an encryption processor, a second converter, and a host interface. The handset interface receives analog output... | 07/24/2001 |
| 6266413 | System and method for synchronizing one time pad encryption keys for secure communication and access control A method for generating an identical electronic one-time pad at a first location and a second location, the method comprising the steps of: (a) providing a first electronic device at the first location and a second electronic device at the second location... | 07/24/2001 |
| 6256736 | Secured signal modification and verification with privacy control A watermarking scheme which allows the watermarked image to be authenticated by an authentication agent without revealing the human-readable content of the image. There is disclosed an approach which combines privacy control with watermarking and authenti... | 07/03/2001 |
| 6252961 | Method and apparatus for performing data encryption and error code correction A drive such as a DVD-ROM drive encrypts an error code correction (ECC) block in a manner that still retains the error correction capabilities of the ECC block. Encryption is performed by generating an encryption mask including a plurality of random numbe... | 06/26/2001 |
| 6223285 | Method and system for transferring information using an encryption mode indicator A method and system for transferring information using an encryption mode indicator (EMI). The present invention provides several secure information communication modes in which data (e.g., representing an audio/visual work) can be transmitted from a sour... | 04/24/2001 |
| 6212280 | Apparatus and methods for managing key material in heterogeneous cryptographic assets Apparatus and methods for managing key material in cryptographic assets are disclosed. The methods can include defining first key material to be delivered to a cryptographic asset, wherein the first key material has a cryptoperiod having an expiration. Se... | 04/03/2001 |
| 6209093 | Technique for producing a privately authenticatable product copy indicia and for authenticating such an indicia A technique for generating, for a given message to be signed, an authentic cryptographic signature that can be authenticated, by a recipient of the signed message, as having originated from a signor of the message; and appropriately authenticating such a ... | 03/27/2001 |
| 6163841 | Technique for producing privately authenticatable cryptographic signatures and for authenticating such signatures A technique for generating, for a given message to be signed, an authentic cryptographic signature that can be authenticated, by a recipient of the signed message, as having originated from a signor of the message; and appropriately authenticating such a ... | 12/19/2000 |
| 6151677 | Programmable telecommunications security module for key encryption adaptable for tokenless use A security module that is preferably tokenless and is used in telephone communications (e.g., cellular) to secure a transmitted bit stream. The module provides traffic encryption, key exchange, key protection, and algorithm protection. The module provides... | 11/21/2000 |
| 6111956 | Method for secure key distribution over a nonsecure communications network In response to an inquiry by an unsophisticated Subscriber over a nonsecure network, a Provider returns a public key and retains the corresponding private key. The Subscriber encrypts a password using the public key, which is decrypted by the Provider. Th... | 08/29/2000 |
| 6075864 | Method of establishing secure, digitally signed communications using an encryption key based on a blocking set cryptosystem The encryption key based on a blocking set cryptosystem includes knowledge of the blocking set, and ciphers (usually independent) on the blocking set and its complement. In order to decipher, a legitimate receiver needs to know only the blocking set and t... | 06/13/2000 |
| 6067621 | User authentication system for authenticating an authorized user of an IC card An user authentication system for authenticating a user using an IC card in conjunction with a portable terminal used to generate a one-time password and a server used to generate a corresponding one-time password for user authentication. The IC card cont... | 05/23/2000 |
| 6061791 | Initial secret key establishment including facilities for verification of identity An issuer offers any type of service secured with a secret cryptographic key assigned to an applicant according to the present invention, which includes a secret key registration process. Usually, the secret key will be loaded on a portable memory device ... | 05/09/2000 |
| 6055316 | System and method for deriving an appropriate initialization vector for secure communications A secure communications arrangement is disclosed including a source device and a destination device interconnected by a network. The source device generates message packets for transfer to the destination device, each message packet including information ... | 04/25/2000 |
| 6047072 | Method for secure key distribution over a nonsecure communications network In response to an inquiry by an unsophisticated Subscriber over a nonsecure network, a Provider returns a public key and retains the corresponding private key. The Subscriber encrypts a password using the public key, which is decrypted by the Provider. Th... | 04/04/2000 |
| 6043752 | Integrated remote keyless entry and ignition disabling system for vehicles, using updated and interdependent cryptographic codes for security A remote-control unit for vehicles in which an immobilizer facility and keyless entry facility are united to enable bidirectional transmission. Further, a cost reduction is achieved by decreasing the number of parts, and labor required for maintenance is ... | 03/28/2000 |
