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Match Document Document Title
7593532 Management of the retention and/or discarding of stored data  
Embodiments of methods, devices and/or systems for a method of managing the retention and/or discarding of stored data are described.
7593528 Managing device keys in cryptographic communication  
To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus...
7590868 Method and apparatus for managing encrypted data on a computer readable medium  
A method and apparatus for managing encrypted data on a computer readable medium wherein an encryption key is determined for a received quantum of data. The quantum of data is encrypted according...
7590238 Managing device keys in cryptographic communication  
To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus...
7577425 Method for securing access to mobile IP network  
Networks consist of administrative domains each including an administrative server and at least one mobility agent deployed therein. The mobility agents offer connectivity to a mobile node via...
7565527 Technique for asymmetric crypto-key generation  
Techniques for generating a multi-factor asymmetric key pair having a public key and split private key with multiple private portions, at least one of the multiple portions being a multiple factor...
7561689 Generating keys having one of a number of key sizes  
An apparatus is disclosed for generating keys having one of a number of key sizes. Memory sections of a memory element are adapted to store a portion of a key. The memory element has a size at...
7549174 Multi-file cryptographic keystore  
A system including an application configured to request a key, a keystore configured to provide the key, wherein the keystore comprises a non-application specific directory, and an...
7546468 Program update method and server  
A system including a secure LSI 1 establishes a communication path to/from a server 3 (UD 1 ), and receives a common key-encrypted program generated by encryption with a common key and...
7545934 Security information packaging system, LSI, and security information packaging method  
To make the strict management of the security information possible, in a security information packaging system 120 which comprises a storing portion 120 a for storing first encrypted security...
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...
7542570 Information encryption transmission/reception method  
An information encrypting transmission and reception method in an information transmission and reception network composed of a plurality of senders and receivers having computers being connected...
7539315 Encrypted communication system, key delivery server thereof, terminal device and key sharing method  
Provided is a method for updating a group key in a highly secure manner and at high speed. A method includes: a step of making subscriber terminals ( 20 ) perform a part of decryption of an...
7532724 Method for encrypting and decrypting data for multi-level access control in an ad-hoc network  
An encryption method for encrypting data for multi-level access control in an ad-hoc network including hierarchical security classes includes encoding data into a predetermined code using a first...
7522725 Method and apparatus for composable block re-encryption of publicly distributed content  
Secure communication from one encryption domain to another using a trusted module. In one embodiment, the invention includes receiving encrypted streamed content encrypted with a first key,...
7515730 Progressive image quality control using watermarking  
The ability to remove a watermark from an encoded image by reversible watermarking opens the possibility of various novel applications. Several such applications are detailed. One permits different...
7515710 Federated digital rights management scheme including trusted systems  
Federated systems for issuing playback certifications granting access to technically protected content are described. One embodiment of the system includes a registration server connected to a...
7499542 Device and method for encrypting and decrypting a block of data  
The purpose of this invention is to propose a new encryption method which offers a high level of security combined with a high execution speed. This aim is achieved by a method to encrypt or...
7493661 Secure transmission system  
A method and apparatus for transferring a message securely from a sender to a recipient over a network and includes at each transfer: creating a message; retrieving the public key of the recipient...
7493429 Communication of information via a side-band channel, and use of same to verify positional relationship  
The present invention provides for trusted side-band communications between components in a computer system, so that use of the system bus may be avoided. Two components may be connected by means...
7484107 Method for selective encryption within documents  
The present invention allows the user (author or creator) of a document to specify that certain portions of a document be selected for encryption while other portions of the document remain...
7483536 Mini time key creation method  
To provide a method and a system for creating a mini time key from a time key, a plurality of mini time keys are created within a unit time period. First, a unit time decryption key is prepared...
7480385 Hierarchical encryption key system for securing digital media  
The hierarchical encryption key system uses multiple encryption processes for encrypting digital media content in a manner that supports both broadcast and delayed or time-shifted modes of content...
7463739 Method and system providing improved security for the transfer of root keys  
Disclosed are a system and a method for transferring with improved security root keys from a key provider system to a customer system via an information network that is other than secure. The key...
7457419 Information processing method and apparatus for encrypting encoded data  
The present invention makes it possible to encrypt a portion of a tile image to be subject to wavelet transformation at or above a desired resolution level without the need to manage multiple...
7454021 Off-loading data re-encryption in encrypted data management systems  
Described is a solution for maintaining the security of encrypted data despite a compromised private key by using a re-encryption process that does not require decryption of the encrypted data. The...
7447903 Laddered authentication security using split key asymmetric cryptography  
A user has two asymmetric crypto-keys, the first having a first private key and the second having a second private key, both of which are split into a first private key portion corresponding to a...
7441116 Secure resource distribution through encrypted pointers  
A secure pointer. The secure pointer can include an encrypted pointer to a resource disposed in a communicatively coupled computing device. The secure pointer also can include a network address of...
7434052 Method and device for producing an encrypted payload data stream and method and device for decrypting an encrypted payload data stream  
In a method for producing an encrypted method payload data stream comprising a header and a block containing encrypted payload data, a payload data key for a payload data encryption algorithm for...
7400725 Information recording medium for recording a scrambled part of content information, and method and apparatus for reproducing information recorded therein  
An information recording medium, such as an optical disk or the like, is provided for recording at least copyrighted content information and cipher key information. A part of the content...
7395431 Data encryption method, recording medium, data transfer apparatus, and encrypted data decryption method  
It is an object of the present invention to more strongly protect data to be distributed from being illegally plagiarized, and further, to add an electronic watermark function necessary to protect...
7386720 Authentication protocol using a multi-factor asymmetric key pair  
Techniques for user authentication based upon an asymmetric key pair having a public key and a split private key are provided. A first portion of the split private key is generated based upon...
7380278 Protecting software environment in isolated execution  
A processing system has a processor that can operate in a normal ring 0 operating mode and one or more higher ring operating modes above the normal ring 0 operating mode. In addition, the...
7379548 Virtual smart card device, method and system  
A system and a method for secure transmission of protected content to a subscriber, without requiring a smart card or other renewable security element to be in physical proximity of the recipient...
7366299 Method for encrypting and decrypting data using derivative equations and factors  
A data cryptographer encrypts and decrypts character data of any given length using derivative equations and factors. The use of factors and derivative equations introduces the randomness required...
7356688 System and method for document distribution  
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...
7356149 Information processing method and apparatus, computer program, and computer-readable storage medium  
An object of this invention is to eliminate the necessity to manage a plurality of keys even when image data having a plurality of tiles and layers is encrypted using different encryption keys for...
7356143 System, method, and apparatus for securely providing content viewable on a secure device  
A system, apparatus, and method are directed to providing and securely viewing secure content. In one embodiment, a secure player provides secure screening/previewing of secure content, such as a...
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...
7346169 Information processing device and method  
An information processing device, information processing method and a recording medium are provided. Storage included in the information processing device is operable to store a node key and a leaf...
7343014 Method for sharing the authorization to use specific resources  
The invention relates to a method for sharing the authorization to use specific resources among multiple devices, which resources are accessible via messages on which a secret key operation was...
7340603 Efficient revocation of receivers  
Methods and apparatus for efficient revocation of receivers. In one implementation, a method of broadcast encryption includes: assigning a respective master key to each of a plurality of receivers,...
7336791 Information processing apparatus  
Upon receipt of a service data request from a client, a license server offering a key to decrypt a content transmits a user information request to the client. On receiving the user information...
7325136 Method and apparatus for secured electronic commerce  
A user anonymously acquires a first sequence of encryption key material. An encryption server, having a second sequence complementary to the first sequence, receives and forwards encrypted messages...
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...
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...
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...
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...
7283633 Information recording and/or reproducing method and information recording and/or reproducing device  
An information reproducing method and an information reproducing device in which the key renewal block (KRB) of the latest version is selectively used to encrypt the content to store the encrypted...
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...
Matches 1 - 50 out of 247 1 2 3 4 5 >