There were three classes of Digital Signatures – Class 1, Class 2 and Class 3, out of which Class 1, Class 2 are outdated and only Class 3 Digital Certificate available as of now.

<strong>Class 3 Digital Signature Certificate</strong>

Class 3 Digital Signature Certificate is an upgraded version of outdated Class 2 Certificate. It is issued to Organizations and individuals who wanted to form a new company or be a director in a company or to who wishes to participate in bidding or government tenders, online tenders and auctions. Sometimes the Certifying Authority may ask for the physical appearance of the applicant (cases like any issue in verification/ suspicious activity, etc.) for availing a class 3 DSC. Class 3 Digital Signature Certificate are prone to data theft, fraudulence and failure of security.

<strong>How DSCs Work?</strong>

Your digital signature provider will use a standard, accepted format called a Public Key Infrastructure (PKI) to create two mathematically linked keys for each signer – a private one and a public one. When you sign a document electronically, you use your private key to create that signature. You must keep your private key secure.

The algorithm used to create the keys acts as a code. It creates data that matches the signed document and then encrypts it. This data is called a hash, and the encrypted hash is your digital signature.

Each signature also contains a timestamp for when the document was signed. If there is any change to the document after the time on that timestamp, it is considered invalid.

When the recipient receives a document, they use a copy of the sender’s public key to decode the signature (using the code used to create the keys). If the public key cannot do so, it means that the signature does not belong to the sender, or the document was changed after it was signed. In either case, the document is considered to be invalid.

To further protect the digital signature's reliability, the PKI that digital signature provider’s use mandates that keys be created, conducted, and saved securely.Digital signatures are especially used when you need to comply with particular regulations or need to conduct high risk or high-value transactions.