Class 2 TCS Digital Signature Certificates, Class 2 TCS, Buy Digital Signature Certificates
Class 2 TCS Digital Signature Certificates, Class 2 TCS, Buy Digital Signature Certificates, Online Digital Signature Certificates
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Class 2 TCS Digital Signature Certificates

A digital signature certificate, also referred to as a public key certificate, is used to sign electronic documents. Digital signatures use asymmetric cryptography and are based on public key technology. Each digital signature certificate owner's identity is verified based on a public key and a private key. The keys which are generated with an algorithm are actually mathematical codes.

Once the user initiates the signing process, a code is generated. The code is unique for each process and content. The individual's private key is now used to encrypt this mathematical code. This is known as a digital signature.

Class 2 digital signature certificates issued by TCS can be purchased online. TCS is a licensed certifying authority. The certificates are legally valid, as per the Indian Information Technology Act, 2000.

Adweb Techno-Trade Pvt Ltd. is the first registration authority for TCS Adweb Techno-Trade Pvt Ltd is authorised to sell Class 2 digital signature certificates and Class 3 digital signature certificates online to government and banking institutions, individuals and private organisations. The buyers could be located anywhere in the world. E-sign is an e-commerce initiative by Adweb Techno-Trade Pvt Ltd to enable businesses to carry out secure online transactions such as online tenders, e-procurement, e-ticketing, encryption of emails etc.

Components of a digital signature certificate:

Serial number: Identifies the unique certificate.

Subject: Identifies the vendor or the organisation. 

Signature algorithm: The signature is created using this algorithm.

Signature: The signature is used to verify the identity of the issuer.

Issuer: It the organisation which verified the information of the applicant and issued the digital signature certificate.

Validity: The period for which the digital certificate is valid. Class 2 digital signature certificates are valid for one year or two years. 

Public key: The public key is a mathematical code generated using an algorithm.

Thumbprint algorithm: The algorithm which is used to hash the public key certificate. Cryptographic hash functions has applications in digital signatures, message authentication codes and other forms of authentication.

Thumbprint: The hash is used as an abbreviated form of the public key certificate.

In order to buy digital certificates online, register on the registration portal at Kindly read and understand the terms and conditions of our portal at . Our system will forward a confirmation email to the user. We advise you to register with a valid and active email address. You can either proceed to purchase the digital certificate online at - or check our 'Certificate wizard'.

How to apply for a class 2 digital signature certificate?

a) Visit to apply for the certificate of your choice. All you have to do is select the following details and fill up your form:

  • The certificate type – Signing certificate or Signing and encryption certificate
  • Validity of the signature certificate – One year or two years.
  • The user type – Individual, company or government and banking

b) Pay the charges for the certificate as per your selection.

c) Download the forms, fill them out completely, follow the instructions on the form and forward them to our office. You can find the information at


TCS CA business was closed on 17th March 2014.

TCS CA will now be issuing digital signature certificates only to the public sector ( government) and will continue to support all retail segment, digital signature certificates issued until that date, for their entire lifetime. Adweb will also continue to support all those digital signature certificates it issued as a Registration Authority until such time as they are due for renewal.

Adweb Techno-Trade Pvt., Ltd., is happy to announce that we continue to service and support our customers with new Sify Technologies (Safescrypt) issued Class 2 digital signature certificate and Class 3 digital signature certificates of all types and for all applications.

Further, we can also renew expiring digital signature certificates of TCS CA with that of Sify Technologies ( Safescrypt). We are also in a position to renew certificates issued by any other organization.

Please feel free to contact us on for any information on this subject.

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A Safescrypt digital signature certificate is your best choice for efiling, etendering and any other application which requires a secure digital credential. These certificates are issued by the Safescrypt(SIFY) CA licensed certification authority

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