Learn “Digital Signature” for working on Cryptography and Blockchain?

Signature confirms that the User who signed the Message is taking responsibility of the message and signature.

PKI system: Each User has Pair of Keys = (Private key and Public key)

Signing has 2 operations :

1)Signing formula (message, Private key) = signature

2)Verifying formula (message, Public key, signature) = True or False

Signing is done by Sender of Message.

Verifying is done by Receiver of Message(validates the Signature as signed by Sender only)

Sender will keep the Private key as secret.

Sender will share Public key with others.

Private key is called Secret key.