Cryptographic Signatures in Silverlight

In Silverlight, cryptographic digital signatures use a Hash-based Message Authentication Code (HMAC) such as the HMACSHA256 algorithm to provide data integrity. When you sign data with a digital signature, someone else can verify the signature, and can prove that the data originated from you and was not altered after you signed it. For more information about digital signatures, see Cryptographic Services in the .NET Framework documentation.