| 6678821 |
Method and system for restricting access to the private key of a user in a public key infrastructure |
| Jan-13-2004 |
An encryption/decryption system for providing restricted use of each key in a plurality of keys to preserve confidentiality of the plurality of keys. Each key is usable by an associated user in a public... |
| 6978017 |
Method and system for providing updated encryption key pairs and digital signature key pairs in a public key system |
| Dec-20-2005 |
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 digital... |
| 6445797 |
Method and system for performing secure electronic digital streaming |
| Sep-3-2002 |
A secure electronic digital streaming system provides absolute system security and user-defined message security for electronic digital streaming between two public entities. These digital streams can... |
| 6819766 |
Method and system for managing keys for encrypted data |
| Nov-16-2004 |
A computer system and method manages encryption keys for data. The system and method generates a session key and encrypts given data with the session key. The system and method generates a key encryption... |
| 7020287 |
Method and system for key insertion for stored encrypted content |
| Mar-28-2006 |
An encrypted content transport stream is received by a viewer's device and recorded for subsequent playback. During recording, keys in headers of packets of the stream are stripped and placed in sequence... |
| 5539824 |
Method and system for key distribution and authentication in a data communication network |
| Jul-23-1996 |
This invention deals with a safe key distribution and authentication in a data communication network (e.g. wireless LAN type of network). The network includes a network manager to which are connected,... |
| 6826689 |
Method and system for emulating a secret code between two hardware modules |
| Nov-30-2004 |
A method and system for emulating a secret code between a first hardware module to a second hardware module. First, the secret code that is initially stored in the first hardware module is transformed... |
| 6301658 |
Method and system for authenticating digital certificates issued by an authentication hierarchy |
| Oct-9-2001 |
A method and system for efficiently authenticating digital certificates issued by an organization's authentication hierarchy. The system includes a verification server that manages a certificate repository... |
| 6961558 |
Method and receiver for receiving a radio broadcast signal having encoded contents |
| Nov-1-2005 |
A receiver for a radio broadcast signal, in particular a car radio, and a method for receiving a radio broadcast signal, including a signal decoder for decoding an audio signal contained in the radio broadcast... |
| 6748082 |
Method and device for introducing a service key into a terminal |
| Jun-8-2004 |
A simple, efficient and reliable introduction of a service key into a terminal is made possible by a method for introducing a service key into a terminal where the terminal can use the service key to decrypt... |
| 6912657 |
Method and arrangement in a communication network |
| Jun-28-2005 |
The present invention relates to the problem of establishing of security that arises within an ad hoc network The problem is solved by using an optical device at a first device to read a public key that... |
| 6347145 |
Method and apparatus of enciphering and deciphering data using keys enciphered and deciphered with other keys |
| Feb-12-2002 |
On a recording medium, first information obtained by enciphering data with the first key and second information obtained by enciphering the first key with each of the predetermined second keys are recorded.... |
| 6928551 |
Method and apparatus for selectively denying access to encoded data |
| Aug-9-2005 |
A method and system is provided for selectively denying access to encoded data. Encryption is used to protect secured data on any of a number of media devices in a system and in which unsecured data is... |
| 6697489 |
Method and apparatus for securing control words |
| Feb-24-2004 |
In accordance with one embodiment, a method for securing control words is provided. The method includes receiving scrambled digital content in a descrambler integrated circuit. The method further includes... |
| 6871279 |
Method and apparatus for securely and dynamically managing user roles in a distributed system |
| Mar-22-2005 |
One embodiment of the present invention provides a system for managing user attributes that determines access rights in a distributed computing system. The system modifies an attribute database, wherein... |
| 6289453 |
Method and apparatus for secure measurement certification |
| Sep-11-2001 |
The invention relates to methods and apparatuses for acquiring a physical measurement, and for creating a cryptographic certification of that measurement, such that its value and time can be verified by... |
| 5828751 |
Method and apparatus for secure measurement certification |
| Oct-27-1998 |
The invention relates to methods and apparatuses for acquiring a physical measurement, and for creating a cryptographic certification of that measurement, such that its value and time can be verified by... |
| 6694025 |
Method and apparatus for secure distribution of public/private key pairs |
| Feb-17-2004 |
A list of public/private key pairs are stored at a server, wherein the private key is stored in an encrypted form, the encryption being based on a master key. To distribute a public/private key pair to... |
| 5940508 |
Method and apparatus for seamless crypto rekey system |
| Aug-17-1999 |
Equipment (10, 20) for facilitating point-to-point cryptographic data communication systems is disclosed. The seamless rekey cryptosystem permits changing of the crypto key (70, 80) with no down time.... |
| 6314189 |
Method and apparatus for quantum communication |
| Nov-6-2001 |
A quantum state or qubit is transmitted from a sender to receiver using a quantum teleportation. For this purpose, first, second and third photons are successively produced from a laser source. The first... |
| 6370249 |
Method and apparatus for public key management |
| Apr-9-2002 |
A method and apparatus for public key management is accomplished when an associated authority provides, from time to time, a public key of at least one of a plurality of certificate authorities to a client.... |
| 6983376 |
Method and apparatus for providing privacy of user identity and characteristics in a communication system |
| Jan-3-2006 |
A method and apparatus for providing privacy of user identity and characteristics in a communication system. A public key and a private key is generated, corresponding to a transceiver. The public key... |
| 6069957 |
Method and apparatus for providing hierarchical key system in restricted-access television system |
| May-30-2000 |
An encryption system for restricted-access television systems. Decryption keys, which are used to decrypt program material, are transmitted to customers in a restricted-access television system. The keys... |
| 6529601 |
Method and apparatus for polarization-insensitive quantum cryptography |
| Mar-4-2003 |
A communication system uses quantum cryptography for the secure distribution of a key. A single-photon signal is phase-modulated and transmitted over a pair of time-multiplexed transmission paths. With... |
| 6295361 |
Method and apparatus for multicast indication of group key change |
| Sep-25-2001 |
A method and apparatus to allow a key manager node in a network to initiate the process of changing a group key for all nodes in a multicasting group. In the described embodiment, the key manager node... |
| 6978025 |
Method and apparatus for managing public keys through a server |
| Dec-20-2005 |
One embodiment of the present invention provides a system for managing public keys through a server that stores associations between public keys and email addresses. This system operates by receiving a... |
| 4567600 |
Method and apparatus for maintaining the privacy of digital messages conveyed by public transmission |
| Jan-28-1986 |
A private message of m bits is conveyed from its sender to its receiver by transmission of a public message of m bits, transmission of a public reply of m bits, and another transmission of a public message... |
| 6078909 |
Method and apparatus for licensing computer programs using a DSA signature |
| Jun-20-2000 |
A method and apparatus for using a Digital Signature Algorithm (DSA) for providing licensing of software. Three steps are required to allow setting up a license, issuing a license and for customer update... |
| 6675297 |
Method and apparatus for generating and using a tamper-resistant encryption key |
| Jan-6-2004 |
The present invention increases the difficulty of reverse engineering sensitive information protected by an encryption algorithm by increasing the difficulty associated with tracing the code that generates... |
| 6748083 |
Method and apparatus for free-space quantum key distribution in daylight |
| Jun-8-2004 |
A quantum cryptography apparatus securely generates a key to be used for secure transmission between a sender and a receiver connected by an atmospheric transmission link. A first laser outputs a timing... |
| 6092201 |
Method and apparatus for extending secure communication operations via a shared list |
| Jul-18-2000 |
A method and apparatus for extending secure communication operations via shared lists is accomplished by creating a shared list in accordance with authorization parameters by one user and subsequently... |
| 5710816 |
Method and apparatus for ensuring receipt of voicemail messages |
| Jan-20-1998 |
A messaging system in which a sender is able to receive certification of receipt of messages sent to a receiver that ensures that only the desired recipient gains access to the messages. Also, the messaging... |
| 6980658 |
Method and apparatus for encrypting transmissions in a communication system |
| Dec-27-2005 |
Method and apparatus for encrypting transmission traffic at separate protocol layers L1, L2, and L3so that separate encryption elements can be assigned to separate types of transmission... |
| 6980660 |
Method and apparatus for efficiently initializing mobile wireless devices |
| Dec-27-2005 |
A method and system for enabling wireless devices distributed throughout an enterprise to be efficiently initialized for secure communications. The method and system utilize well known public key cryptography... |
| 6341164 |
Method and apparatus for correcting improper encryption and/or for reducing memory storage |
| Jan-22-2002 |
An apparatus and methods for facilitating an encryption process for use in systems employing cryptography based security, removes unnecessary data relating to encryption keys prior to storing the data... |
| 6975730 |
Method and apparatus for contents information |
| Dec-13-2005 |
A first-key signal representative of a first key is generated from first-key base information being a base of the first key. Contents information is encrypted into encryption-resultant contents information... |
| 6334185 |
Method and apparatus for centralized encryption key calculation |
| Dec-25-2001 |
A system and method for encrypting transmissions between a plurality of communication nodes and a mobile station, wherein the algorithm for generating an encryption key resides within a first communications... |
| 6950520 |
Method and apparatus for carrying data in a video signal so that the data is not recorded |
| Sep-27-2005 |
A method and apparatus for modifying a video signal to allow it to carry encoded data which is detectable at a suitably compliant receiver but is not recorded by a conventional video recorder. One application... |
| 6131160 |
Method and apparatus for an adapter card providing conditional access in a communication system |
| Oct-10-2000 |
A method and apparatus for an adapter card, for use in a computer, to provide conditional access by the computer to incoming data streams while maintaining the security of information by maintaining a... |
| 6957344 |
Manufacturing trusted devices |
| Oct-18-2005 |
The present invention discloses a method and apparatus for manufacturing trusted devices. A licensing authority provides keying information to a multitude of manufactures that insert the keying information... |
| 6199161 |
Management of authentication keys in a mobile communication system |
| Mar-6-2001 |
A method and mobile communication system for managing authentication keys, the system having at least one authentication center, base stations and mobile stations to which subscriber identity modules may... |
| 6535980 |
Keyless encryption of messages using challenge response |
| Mar-18-2003 |
A method of keyless encryption of messages allows secure transmission of data where data security is not available for some technical or legal reason. The method of data transfer uses a challenge response... |
| 6385723 |
Key transformation unit for an IC card |
| May-7-2002 |
A multi-application IC card system and method is disclosed providing a secure data transmission technique. The method is used, for example, to load an application from an application provider, which could... |
| 6236729 |
Key recovery method and system |
| May-22-2001 |
A key recovery method and system capable of key recovery without informing a third party of one's own secret key are disclosed. For realization of the method, a transmitting information processor generates... |
| 6658114 |
Key management method |
| Dec-2-2003 |
A key management method to prevent illegal eavesdropping in a network system. Keys of the network system are divided into several family subkeys and several communication subkeys. A plurality of trusted-key... |
| 5812664 |
Key distribution system |
| Sep-22-1998 |
This invention is a system for producing and distributing new decryption keys to verifiers. Verifier decryption key updates are printed in a secure manner on paper or postcards and mailed to the owners... |
| 6512829 |
Key distribution method and system in secure broadcast communication |
| Jan-28-2003 |
A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center... |
| 6041408 |
Key distribution method and system in secure broadcast communication |
| Mar-21-2000 |
A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center... |
| 6487661 |
Key agreement and transport protocol |
| Nov-26-2002 |
A key establishment protocol includes the generation of a value of cryptographic function, typically a hash, of a session key and public information. This value is transferred between correspondents together... |
| 6052469 |
Interoperable cryptographic key recovery system with verification by comparison |
| Apr-18-2000 |
A cryptographic key recovery system that is interoperable with existing systems for establishing keys between communicating parties. The sender uses a reversible key inversion function to generate key... |
