1815 results about "Tamper resistance" patented technology

A method and device are provided for controlling access to data. Portions of the data are protected and rules concerning access rights to the data are determined. Access to the protected portions of the data is prevented, other than in a non-useable form; and users are provided access to the data only in accordance with the rules as enforced by a mechanism protected by tamper detection. A method is also provided for distributing data for subsequent controlled use of those data. The method includes protecting portions of the data; preventing access to the protected portions of the data other than in a non-useable form; determining rules concerning access rights to the data; protecting the rules; and providing a package including: the protected portions of the data and the protected rules. A user is provided controlled access to the distributed data only in accordance with the rules as enforced by a mechanism protected by tamper protection. A device is provided for controlling access to data having protected data portions and rules concerning access rights to the data. The device includes means for storing the rules; and means for accessing the protected data portions only in accordance with the rules, whereby user access to the protected data portions is permitted only if the rules indicate that the user is allowed to access the portions of the data.

Secure computation environments are protected from bogus or rogue load modules, executables and other data elements through use of digital signatures, seals and certificates issued by a verifying authority. A verifying authority-which may be a trusted independent third party-tests the load modules or other executables to verify that their corresponding specifications are accurate and complete, and then digitally signs the load module or other executable based on tamper resistance work factor classification. Secure computation environments with different tamper resistance work factors use different verification digital signature authentication techniques (e.g., different signature algorithms and / or signature verification keys)-allowing one tamper resistance work factor environment to protect itself against load modules from another, different tamper resistance work factor environment. Several dissimilar digital signature algorithms may be used to reduce vulnerability from algorithm.

An electronic event recorder for attachment to a vehicle is provided which can broadcast encrypted signature and data, thereby leaving behind an electronic version of a "fingerprint" in the event of an accident or traffic violation. The fingerprint, captured by an external data acquisition system or another vehicle so equipped, provides a history of events related to the vehicle. The event recorder is preferably integrated on a smart card and housed in a tamper proof casing. In a first mode of operation, monitoring stations along the roadways periodically send an interrogation signal, such as when radar detects that the vehicle is speeding. Upon receiving the interrogation signal the smart card transmits the vehicle's signature information to the monitoring station where it is time and date stamped along with the speed of the vehicle. In a second mode of operation, when a sensor detects a sudden or violent acceleration or deceleration, such as occurs during a collision, a smart card mounted in each car will exchange signature information automatically. This is particularly useful when the collision occurs in a parking lot when one of the hit vehicles is typically unattended.

Memory Cards containing Integrated Circuits and other electronic components (e.g. resistors) in a variety of form factors having high quality external surfaces of polycarbonate, synthetic paper (e.g. Teslin), or other suitable material (e.g. PVC) can be made through use of injection molded thermoplastic material or thermosetting material that becomes the core layer of said Memory Cards and similar devices. The object of the invention is to provide the following properties to Memory Cards: rapid production cycle, high volume manufacturing throughput, security, electronics protection, better tamper resistance, durability, and highly reliable complex electronics encapsulation, achieved through a process utilizing low temperature and low pressure.

A lid (2) for a container (1) which lid comprises: a cover portion (5) adapted to extend over the container (1); an implement (3) adapted for use with contents (27) of the container, and a hinge (4, 6) connecting the cover portion (5) to the implement (3), wherein the implement is adapted to be rotated about the hinge (4, 6) into a storage position in which the implement lies against the cover portion. The cover portion may also be provided with an anti-tamper device or a tamper resistant or tamper proof arrangement.

A smart passport comprising a smart inlay that includes a core substrate operative to store and exchange information contactlessly with an external reader, at least one physical security component coupled to the core substrate and operative to render the smart inlay and thereby the passport tamper-proof, and a logical security component incorporated in the core substrate and operative to render the smart inlay and thereby the passport forgery-proof. The physical security component is preferably selected from the group at least one tear line and at least one patterned adhesive, both operative to cause irreversible damage to the information storage and communication capabilities of the passport in case of tampering.

Computation environments are protected from bogus or rogue load modules, executables, and other data elements through use of digital signatures, seals, and certificates issued by a verifying authority. A verifying authority—which may be a trusted independent third party—tests the load modules and / or other items to verify that their corresponding specifications are accurate and complete, and then digitally signs them based on a tamper resistance work factor classification. Secure computation environments with different tamper resistance work factors use different digital signature authentication techniques (e.g., different signature algorithms and / or signature verification keys), allowing one tamper resistance work factor environment to protect itself against load modules from another tamper resistance work factor environment. The verifying authority can provide an application intended for insecure environments with a credential having multiple elements covering different parts of the application. To verify the application, a trusted element can issue challenges based on different parts of the authenticated credential that the trusted element selects in an unpredictable (e.g., random) way, and deny service (or take other appropriate action) if the responses do not match the authenticated credential.

A tamper-proof enclosure for an electrical card, such as a high speed communications card, includes an enclosure in which the card is mounted. The enclosure has a wall with an opening, and a cup member is attached to the wall at the opening. A bus that is connected to the card extends through a passage in the cup member and through the opening in the wall. A security mesh is wrapped around the enclosure. The cup member is filled with liquid resin, which is also coated onto the security mesh. After the resin is cured, the resin in the cup member forms a plug that seals the security mesh from inner pressure when the enclosure is heated to an elevated temperature. The resin is preferably polyamide.

A fastener includes a round, blind hole or pocket in its head. Installation and removal of the fastener is accomplished with a tool containing an eccentric segment on the end of a shaft. When rotated within the pocket, the eccentric segment displaces laterally relative to the shaft to provide a friction grip to the lateral wall of the pocket. The strength of the grip is proportional to the applied torque. Eccentric displacement allows rotation but prevents the tool from spinning out of the fastener thereby eliminating cam-out and surface damage resulting from contact with a spinning tool tip. The eccentric head of the tool can be made disposable and to shear off when a predetermined torque is reached. The smooth-sided round hole offers no purchase for commonly available tools; making the fastener tamper-resistance. In another embodiment, the fastener includes a raised portion in the pocket. A tool having a complementary opening shears off the raised portion at a predetermined torque.

A system and method provide efficient, secure, and highly reliable authentication for transaction processing and / or access control applications. A Personal Digital Key is a portable device carried by an individual that stores one or more profiles (e.g., a biometric profile) in a tamper-proof memory. When multiple PDKs are present at the point of the transaction, the system automatically determines which PDK to associate with the authentication and transaction processes. The differentiation decision is based on one or more differentiation metrics including distance information, location information, and detection duration information associated with each of the PDKs within range. Profile samples comprising subsets of the profile information are received to provide a quick correlation between a PDK an input sample (e.g., a subset of a biometric input). After determining which PDK should be associated with the transaction, a full authentication process is executed.

Systems and methods are disclosed for protecting a computer program from unauthorized analysis and modification. Obfuscation transformations can be applied to the computer program's local structure, control graph, and / or data structure to render the program more difficult to understand and / or modify. Tamper-resistance mechanisms can be incorporated into the computer program to detect attempts to tamper with the program's operation. Once an attempt to tamper with the computer program is detected, the computer program reports it to an external agent, ceases normal operation, and / or reverses any modifications made by the attempted tampering. The computer program can also be watermarked to facilitate identification of its owner. The obfuscation, tamper-resistance, and watermarking transformations can be applied to the computer program's source code, object code, or executable image.