摘要:
A method for preserving privacy during authorisation in pervasive environments is described. The method includes an authorisation phase in which the user is provided with a reusable credential associated with verifiable constraints, and an operation phase where the service provider verifies the reusable credential before authorising the user. Third parties cannot link plural uses of the credential to each other, and the service provider cannot link plural uses of said credential to each other.
摘要:
A method of controlling access to content comprises receiving, at a domain gateway (3) of a domain (4), a request from a device (5) in the domain for access to the content. It is determined at the domain gateway whether the number of devices in the domain currently accessing the content is equal to a specified maximum number of devices that may simultaneously access the content. The maximum number of devices that may simultaneously access the content is independent of the number of devices in the domain. If the determination is that the number of devices in the domain currently accessing the content is less than the specified maximum number the request is allowed, otherwise it is refused.
摘要:
A method and apparatus for establishing a cryptographic relationship between a first node and a second node in a communications network. The first node receives at least part of a cryptographic attribute of the second node, uses the received at least part of the cryptographic attribute to generate an identifier for the first node. The cryptographic attribute may a public key belonging to the second node, and the identifier may be a Cryptographically Generated IP address. The cryptographic relationship allows the second node to establish with a third node that it is entitled to act on behalf of the first node.
摘要:
A method of improving privacy by hiding, in an ordered sequence of messages M[x(1), D(1)], M[x(2), D(2)], etc, communicated between a first and at least one second party sharing a key k, metadata x(i) descriptive of message processing, wherein D(i) denotes payload data. The method comprises the first and the second party agreeing on a pseudo random mapping depending on a shared key k, Fk, mapping at least x(i) to y(i), and the first party modifying the messages by replacing x(i) by y(i) in each message M(x(i), D(i)). The first party then transmits the modified messages maintaining their original order, and on reception of a message M(y(m), D), the second party uses a mapping Gk to retrieve position m of received value and the original value x(m).
摘要:
Binary data representing a code word of an error-correcting code is used for calculating a syndrome, wherein a given portion of the binary data comprises k groups of data bits and represents a field element of the finite field GF(pk), p being an odd prime number, the field element comprising k coefficients in accordance with a polynomial basis representation, each group of data bits of the given portion representing a corresponding one of the k coefficients. The given portion is stored in a first general purpose register and is processed such that the k groups of data bits of the given portion are processed in parallel; determining whether the syndrome is equal to zero; and detecting and correcting errors in the binary data if the syndrome is not equal to zero.
摘要:
The invention generally relates to a tamper-resistant security device, such as a subscriber identity module or equivalent, which has an AKA (Authentication and Key Agreement) module for performing an AKA process with a security key stored in the device, as well as means for external communication. The idea according to the invention is to provide the tamper-resistant security device with an application adapted for cooperating with the AKA module and means for interfacing the AKA module and the application. The application cooperating with the AKA module is preferably a security and/or privacy enhancing application. The application is advantageously a software application implemented in an application environment of the security device. For increased security, the security device may also be adapted to detect whether it is operated in its normal secure environment or a foreign less secure environment, and set access rights to resident files or commands that could expose the AKA process or corresponding parameters accordingly.
摘要:
A method of facilitating the lawful interception of an IP session between two or more terminals 12,13, wherein said session uses encryption to secure traffic. The method comprises storing a key allocated to at least one of said terminals 12,13 or to at least one of the subscribers using one of the terminals 12,13, at the terminal 12,13 and at a node 5,8 within a network 1,6 through which said session is conducted, or a node coupled to that network. Prior to the creation of said session, a seed value is exchanged between the terminal 12,13 at which the key is stored and said node 5,8. The key and the seed value are used at both the terminal 12,13 and the node 5,8 to generate a pre-master key. The pre-master key becomes known to each of the terminals 12,13 involved in the IP session and to the network node 5,8. The pre-master key is used, directly or indirectly, to encrypt and decrypt traffic associated with said IP session.
摘要:
A method and apparatus to establish trust between two nodes in a communications network. A first node receives from a network node authentication data unique to the first node, which can be used to derive a compact representation of verification data for the first node. The first node also receives a certified compact representation of verification data of all nodes in the network. The first node derives trust information from the authentication data for the node, and sends to a second node a message that includes the trust information and part of the authentication data. The second node has its own copy of the certified compact representation of verification data of all nodes in the network, and verifies the authenticity of the message from the first node using the compact representation of verification data of all nodes in the network and the received trust information and authentication data.
摘要:
A Personal Area Network Security Domain (PSD) is formed between devices (142, 150, 152, 154 and 156). The PSD allows the sharing of data and/or resources between the devices within the PSD. The devices within the PSD are located remotely from one another. For example, communication between device (150 and 156) will be performed via mobile or cellular telephone network (120), the Internet (140) and mobile or cellular telephone network (126). Each network (120, 126) is provided with a PSD Hub, which enables an IPsec secure connection between the devices (150 and 156) to be established.
摘要:
Before actually communicating information/data between two endpoints (C, S) connected to a network a secure and confidential distribution of a special key (K h) is performed to nodes (R j) along a path in the network. This is allowed by performing a path handshaking procedure in which first a hint token is forwarded along the path in a first direction and then a disclosure token is forwarded in the opposite direction. In forwarding the disclosure token it is verified in the nodes against the already received hint token. This assures that only nodes on-the particular path will receive the special key or possibly some other information related thereto.