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1747 results about "Tamper resistance" patented technology

Tamper resistance is resistance to tampering by either the normal users of a product, package, or system or others with physical access to it. There are many reasons for employing tamper resistance. Tamper resistance ranges from simple features like screws with special drives, more complex devices that render themselves inoperable or encrypt all data transmissions between individual chips, or use of materials needing special tools and knowledge. Tamper-resistant devices or features are common on packages to deter package or product tampering. Anti-tamper devices have one or more components: tamper resistance, tamper detection, tamper response, and tamper evidence. In some applications, devices are only tamper-evident rather than tamper-resistant.

System for controlling access and distribution of digital property

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.
Owner:HANGER SOLUTIONS LLC

System for controlling access and distribution of digital property

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.
Owner:HANGER SOLUTIONS LLC

Systems and methods for using cryptography to protect secure and insecure computing environments

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.
Owner:INTERTRUST TECH CORP

Systems and methods for using cryptography to protect secure and insecure computing environments

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.
Owner:INTERTRUST TECH CORP

Technique for producing through watermarking highly tamper-resistant executable code and resulting "watermarked" code so formed

InactiveUS7051208B2Improvement in tamper-resistanceSecurely watermarkDigital data processing detailsUser identity/authority verificationControl flowTamper resistance
Apparatus and an accompanying method, for forming and embedding a highly tamper-resistant cryptographic identifier, i.e., a watermark, within non-marked executable code, e.g., an application program, to generate a “watermarked” version of that code. Specifically, the watermark, containing, e.g., a relatively large number of separate executable routines, is tightly integrated into a flow pattern of non-marked executable code, e.g., an application program, through randomly establishing additional control flows in the executable code and inserting a selected one of the routines along each such flow. Since the flow pattern of the watermark is highly intertwined with the flow pattern of the non-marked code, the watermark is effectively impossible to either remove from the code and / or circumvent. The routines are added in such a manner that the flow pattern of resulting watermarked code is not substantially different from that of the non-marked code, thus frustrating third party detection of the watermark using, e.g., standard flow analysis tools. To enhance tamper-resistance of the watermarked code, each such routine can provide a pre-defined function such that if that routine were to be removed from the marked code by, e.g., a third party adversary, then the marked code will prematurely terminate its execution.
Owner:MICROSOFT TECH LICENSING LLC
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