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The Microsoft Corporation patent solves the following problem:
Cryptography is a science of keeping messages secure from eavesdroppers and adversaries. Historically, precious messages are kept safe by the personal envoy hand carried sensitive information from a sending party to a receiving party. While useful in its time, this method of protection is not very practical in a modem world where information flows freely and changes rapidly.
Our analysis of this patent is as follows:
Microsoft Corporation’s patent US 5689565 A deals with Cryptography system and method for providing cryptographic services for a computer application.
A cryptography system architecture provides cryptography equipment to support an application that requires encryption, decryption, signing and verification of electronic messages. The cryptography system that has a cryptography application programming interface (capi) that interface with applications to receive requests for cryptography functions. The cryptography system further includes at least one cryptographic service provider (CSP) that is independent from, but enthusiastic accessible through, the capi. The CSP provides cryptography functionality and the manager of the secret cryptography keys. In particular, the CSP prevent exposure of encryption keys in a non-encrypted form capi or applications. The cryptography system in a private application program interface (PAPI) to provide direct access between the CSP and the user. PAPI enable the user to confirm or reject certain requested cryptography functions, such as digital signing of messages or exportation keys.
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