Visa U.s.a. Inc.

Cheyenne Property Trust

Vista U.s.a.

Cheyenne Property Trust C/o Data Securities International, Inc.

Roger Merckling

Ayman A Hammad

Patrick Gauthier

Keith S Klemba

Helmut Fieres

A method for providing messaging between a portable device and base device is provided. The method included communicating one or more message codes maintained in the portable device to the base device. The base device then composes a message for a user of the portable device using a dictionary of message codes. The message codes have corresponding message values, which are used to generate the message for the one or more message codes. The generated message is then provided to the user.

Compact protocol and solution for substantially offline messaging between portable consumer device and base device

A method for providing messaging between a portable device and base device is provided. The method includes communicating one or more message codes maintained in the portable device to the base device. The base device then composes a message for a user of the portable device using a dictionary of message codes. The message codes have corresponding message values, which are used to generate the message for the one or more message codes. The generated message is then provided to the user.

Compact protocol and solution for substantially offline messaging between portable consumer device and based device

An international cryptography framework (ICF) is provided that allows manufacturers to comply with varying national laws governing the distribution of cryptographic capabilities. In particular, such a framework makes it possible to ship worldwide cryptographic capabilities in all types of information processing devices (e.g. printers, palm-tops). The ICF comprises a set of service elements which allow applications to exercise cryptographic functions under the control of a policy. The four core elements of the ICF architecture, i.e. the host system, cryptographic unit, policy activation token, and network security server, comprise an infrastructure that provides cryptographic services to applications. Applications that request cryptographic services from various service elements within the ICF are identified through a certificate to protect against misuse of a granted level of cryptography. The host system comprises a set of system programs and services which provide the application with an execution environment. The host system's role within the ICF is twofold. First, the host system provides services to the application in the form of programming interfaces to access the functions offered by the cryptographic unit. Second, the host system provides support for the cryptographic unit in building trust relationships to the host system elements, such as the cryptographic programming interfaces, operating systems drivers, and memory management subsystems.

Host system elements for an international cryptography framework

An international cryptography framework (ICF) allows manufacturers to comply with varying national laws governing the distribution of cryptographic capabilities. The invention is concerned primarily with the application certification aspects of the framework where an application that requests cryptographic services from the ICF service elements is identified through some form of certificate to protect against the misuse of a granted level of cryptography. The levels of cryptography granted are described via security policies and expressed as classes of service. A cryptographic unit, one of the ICF core elements, can be used to build several certification schemes for application objects. The invention provides various methods that determine the strength of binding between an application code image and the issued certificates within the context of the ICF elements. A key element with regard to the exercise of a cryptographic function concerns the special requirements for the trust relation that an authority specifies for the cryptographic unit. Any function exercised by the cryptographic unit must be controllable by the associated class of service which represents the security policy. Touchpointing, both in the application and the firmware elements inside the cryptographic unit, plays a key role in exercising control over the functioning of these modules. Another fundamental requirement of the ICF architecture is that the application is assured of the integrity of the cryptographic unit from which it is receiving services. Thus, the invention also provides methods that allow a determination of whether or not the cryptographic unit has been replaced or tampered with.

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Palo Alto, CA, United States of America

Roger Merckling