| Platform SDK: Cryptography |
To provide for interoperability with other cryptographic service providers (CSPs), any PROV_RSA_FULL CSP must conform to specific implementation requirements. The PROV_RSA_SIG provider type is a subset of PROV_RSA_FULL and not all of the implementation requirements discussed apply to PROV_RSA_SIG providers.
Major areas that must conform to implementation requirements are listed in the following table.
| Major requirement | Description |
|---|---|
| Supported algorithms | The minimum set of algorithms that must be supported by all PROV_RSA_FULL and PROV_RSA_SIG providers. |
| Key BLOB formats | The standard encoding schemes for key BLOBs. Using standard encoding schemes enables keys to be exchanged between CSPs even if the CSPs come from different vendors. |
| Deriving session keys | The procedure for deriving session keys from hash values so that given the same base data, every CSP generates exactly the same session key. |
| Hashing session keys | The procedure for hashing session keys so that given the same session key, every CSP generates exactly the same hash value. |
| Digital signature mechanics | The mechanics of digital signatures and signature format so that different CSPs can verify each other's signatures. |