![]() First, a hash value must be created from the message in the same way the signature was created. ![]() To verify a signature, both the message and the signature are required. The following is an illustration of the steps involved in creating a digital signature. This hash value is then signed, using the signer's private key. The first step involves creating a hash value (also known as a message digest) from the message. There are two steps involved in creating a digital signature from a message. This process is shown in the following illustration. A private key generates the signature, and the corresponding public key must be used to validate the signature. Decrypting the signature data using the sender's public key proves that the data was encrypted by the sender or by someone who had access to the sender's private key.ĭigital signatures are generated by using public key signature algorithms. A digital signature is a short piece of data that is encrypted with the sender's private key. Signing a message does not alter the message it simply generates a digital signature string you can either bundle with the message or transmit separately. ![]() Digital signatures can be used to distribute a message in plaintext form when the recipients must identify and verify the message sender.
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