Frequently Asked Question on Digital Signatures and Certificates

What is a digital signature?

A digital signature is a mathematical technique used to validate the authenticity and integrity of a message, software, or digital document. 

What is a digital certificate?

Digital certificate is issued by a trusted third party which proves sender’s identity to the receiver and receiver’s identity to the sender. 

Can digital signatures be forged?

It is very difficult to forge a digital signature with having private key.

What is a self-signed certificate?

A self-signed certificate is a certificated signed by owns private key rather then trusted third party.

What is a Public Key Infrastructure (PKI)?

The hardware, software, policies, protocols, and procedures needed to generate, manage, distribute, utilise, store, and revoke digital certificates and public keys are collectively referred to as the public key infrastructure, or PKI.

Encryption – Process of converting electronic data into another form, called ciphertext, which cannot be easily understood by anyone except the authorized parties. This assures data security. 
Decryption– Process of translating code to data. 

• The message is encrypted at the sender’s side using various encryption algorithms and decrypted at the receiver’s end with the help of the decryption algorithms.
• When some message is to be kept secure like username, password, etc., encryption and decryption techniques are used to assure data security.

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