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| Number | Title | Issue Date |
| 8175269 | System and method for enterprise security including symmetric key protection A system and method for enterprise security including symmetric key protection. In accordance with an embodiment, the system provides a higher level of protection against unauthorized key disclosure by encrypting randomly generated seed data used for key generation,... | 05/08/2012 |
| 8090100 | Storage apparatus and data management method for changing keys of a logical volume and common resource A storage apparatus, which controls the input and output of data to and from a computer, includes a logical volume for storing data from the computer, a common resource for storing data pre-stored in the logical volume as update data in order to store subsequent dat... | 01/03/2012 |
| 8059814 | Techniques for carrying out seed or key derivation A technique carries out seed (or key) derivation within an electronic apparatus (e.g., a hand holdable electronic apparatus such as a token, an authentication server, etc.). The technique involves acquiring a stored representation of a derived seed, the stored repre... | 11/15/2011 |
| 8031867 | Method of verifying the integrity of an encryption key obtained by combining key parts The method of verifying the integrity of an encryption key (K) obtained by combining at least two key portions (KM, M) in a protected zone (3) by using a commutative operator, comprises the steps of: using the commutative operator to perform a first combinati... | 10/04/2011 |
| 8000472 | Information encryption apparatus and controlling method of the same, computer program and computer readable storage medium The present invention stores and manages only one piece of key information even if contents information includes a plurality of partial contents arranged in a sequence, and the partial contents are encrypted with different keys. When a piece of contents information ... | 08/16/2011 |
| 7978849 | Image forming apparatus, and control method thereof An image forming apparatus of the invention includes a key generating unit to change an encryption key and to generate an encryption key different from the previous encryption key at each time of change, an encryption unit to encrypt image data using the encryption ... | 07/12/2011 |
| 7864953 | Adding an additional level of indirection to title key encryption Systems, methods and media for encrypting and decrypting content files are disclosed. More particularly, hardware and/or software for adding an additional level of indirection to a title key encryption scheme are disclosed. Embodiments may include generating by a cr... | 01/04/2011 |
| 7853016 | Signature schemes using bilinear mappings Methods and systems are provided for generating and verifying signatures of digital messages communicated between signers and verifiers. Using bilinear mappings, such as Weil or Tate pairings, these methods and systems enable generation and verification of efficient... | 12/14/2010 |
| 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 allowing the first communication apparatus to perform cryptographic comm... | 09/22/2009 |
| 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 allowing the first communication apparatus to perform cryptographic comm... | 09/15/2009 |
| 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 120a for storing first encrypted security information EDK(MK)/address obtained by encrypting fin... | 06/09/2009 |
| 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 public key of a highest security class, adding a private key of a secu... | 05/12/2009 |
| 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 a server computing device able to locate the resource based upon a de... | 10/21/2008 |
| 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 encrypting payload data is generated. The payload data is encrypted us... | 10/07/2008 |
| 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 information is scrambled and recorded in the information recording medium, and ... | 07/15/2008 |
| 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 the copyright to all reproduction means apparatuses. In order to achi... | 07/01/2008 |
| 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 multiple factors under control of the user. The factors include a password... | 06/10/2008 |
| 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 processor can operate in an isolated execution mode. A memory in... | 05/27/2008 |
| 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 module of the subscriber, such as a set-top box for example. Therefore... | 05/27/2008 |
| 7369904 | Integration method for automation components A method for integrating a number of automation components into an industrial controller with a uniform running level model of the runtime system. The basic clock of the running level model is devised from either an internal timer, an internal clock of a communicati... | 05/06/2008 |
| 7366354 | 10-bit per pixel processing using 8-bit resources This invention relates to an imaging device that extends the processing of resources to data having a greater bit-depth. A signal having data at the first bit-depth is received, and at least a portion of the data at the first bit-depth is converted into an estimated... | 04/29/2008 |
| 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 for effective encryption without the use of complex mathematics. A se... | 04/29/2008 |
| 7363486 | Method and system for authentication through a communications pipe A method and system for authenticating an end user to one or more remote computer systems using a communications pipe to send authentication codes from a personal security device to one or more remote computer systems and limiting authentication transactions to a se... | 04/22/2008 |
| 7362870 | Method and apparatus for recording/playing back information A data processing apparatus extracts a root key by decrypting an enabling key block. The data processing apparatus then produces a content key on the basis of a random number and encrypts the content key using the root key. Furthermore, the data processing apparatus... | 04/22/2008 |
| 7363496 | Authenticated ID-based cryptosystem with no key escrow A method and system are provided for determining a shared secret between two entities in a cryptosystem. A first random secret is selected that is known to the first entity and unknown to the second entity. A first intermediate shared secret component is determined ... | 04/22/2008 |
| 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 the respective tiles and layers. For this purpose, in this invention,... | 04/08/2008 |
| 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 and the original messages. Such methods are more secure and more effi... | 04/08/2008 |
| 7356148 | Information processing method and apparatus, computer program, and computer-readable storage medium Image data encoded in units of a tile is processed to define a hierarchical structure by repeatedly forming one tile group from adjacent tiles and another tile group from adjacent tile groups. Plural partially encoded data a tile located at a terminal of the hierarc... | 04/08/2008 |
| 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 motion picture, by a member of an awards organization. A content key i... | 04/08/2008 |
| 7353395 | Authenticated ID-based cryptosystem with no key escrow A method and system are provided for determining a shared secret between two entities in a cryptosystem. A first random secret is selected that is known to the first entity and unknown to the second entity. A first intermediate shared secret component is determined ... | 04/01/2008 |
| 7353382 | Security framework and protocol for universal pervasive transactions A computer system, a method of a computer system and a computer-readable medium securely transmit and verify a multiparty agreement. The method, the computer system, and the computer readable medium include developing and transmitting views of the multi-party agreem... | 04/01/2008 |
| 7349538 | Hierarchical identity-based encryption and signature schemes Methods are provided for encoding and decoding a digital message between a sender and a recipient in a system including a plurality of private key generators (“PKGs”). The PKGs include at least a root PKG and n lower-level PKG in the hierarchy between the root P... | 03/25/2008 |
| 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 includes the steps of (a) a first user, modulating signals from a so... | 03/25/2008 |
| 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 key, the leaf key being unique to the information processing device ... | 03/18/2008 |
| 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 files within a TPM chip according to TCPA specifications and simultaneou... | 03/11/2008 |
| 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 applied with a predetermined secret master key d available at a master d... | 03/11/2008 |
| 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, where each master key can be used to derive two or more of a plurali... | 03/04/2008 |
| 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 request, the client displays a message prompting its user to enter such u... | 02/26/2008 |
| 7337322 | Hierarchical identity-based encryption and signature schemes Methods are provided for encoding and decoding a digital message between a sender and a recipient in a system including a plurality of private key generators (“PKGs”). The PKGs include at least a root PKG and n lower-level PKG in the hierarchy between the root P... | 02/26/2008 |
| 7336789 | System for providing encrypted data, system for decrypting encrypted data and method for providing a communication interface in such a decrypting system A system and method for providing encrypted data for use in a content player are described. The system comprises an encryption device for encrypting data using an encryption algorithm, and a protection device for providing security device data and for providing info... | 02/26/2008 |
