Nowadays many business transactions occur digitally using the Internet.Businesses must obtain the same level of assurance about the enforceability of a digital transaction that a signed document provides for a paper-based transaction. Digital signature is used to accomplish this by using hashing and asymmetric encryption. Please use a diagram to explain the mechanism of asymmetric encryption through the use of public key and private key. Also, in Digital Signature, the private key is used to encrypt the documents. Please explain why.