Related links:

  • What is a Digital Signature?
    Currently, many applications or forms submitted by a citizen require physical signature of the citizen. A digital signature takes the concept of traditional paper-based signing and turns it into an electronic "fingerprint." This "fingerprint," or coded message, is unique to both the document and the signer and binds them together. In short, a digital signature has the same function as that of a handwritten signature. Some of the salient features of digital signature are non-repudiation, integrity and authenticity. The Information Technology Act 2000 provides the required legal sanctity to digital signatures based on asymmetric crypto systems.

  • e-Sign Service
    Wide-scale usage of ICT devices coupled with range of ICT services being available for users demands the need for authentic records and documents online. Present methods of obtaining Digital Signature Certificates and e-signing document are cumbersome.

    Government of India vide its Gazette Notification (REGD. NO. D. L.-33004/99 dated 28th January 2015) has announced a method that facilitates Certifying Authority to offer e-Sign service to citizens who have Aadhaar ID.

    The objective of eSign service is to offer on-line service to citizens for instant signing of their documents securely in a legally acceptable form. Two major challenges involved are (a) authentication of the user and (b) Trusted method of signing. Aadhaar based authentication is carried out to address the first challenge and Public Key Infrastructure (PKI) is used to securely sign the user document and establish the trust.

    Citizens with Aadhaar ID will be able to upload their documents to eSign service to obtain them digitally signed. At the backend, validation of user is carried out using Aadhaar service and generates a key pair (a public key and a private key) for the user and signs the document. The user is provided with the digitally signed document and the Digital Signature Certificate.

    C-DAC through its e-Hastakshar initiative enables citizens with valid Aadhaar ID and registered mobile number to carryout digital signing of their documents on-line.

  • Benefits of e-Sign Service

    1. Secure online service
      eSign services are offered by trusted third party service provider, like Certifying Authorities (CA) licensed as per the IT Act under the Controller of Certifying Authorities (CCA). C-DAC plays the role of CA and has placed necessary security measures to ensure security of the whole signing process.

    2. No Physical verification required
      Unlike the case of traditional CA that requires verification process by a personal visit which cause inconvenience, eSign provides ease of service on-line based on Aadhaar based e-Authentication.

    3. No need of Hardware tokens
      eSign is an online service and with this, traditional hardware-tokens are not required anymore.

    4. Multiple ways to authenticate
      eSign service provides authentication based on multiple ways such as One-Time-Password (OTP, received through registered mobile in Aadhaar database) or Biometric (fingerprint or iris-scan). Presently enabled for OTP based authentication.
    5. Privacy is preserved
      eSign service ensures the privacy of the signer by just requiring the hash of the document instead of the complete document.

Download C-DAC CA CPS
Download Certificate of C-DAC CA
Download CRL


ASP Onboarding:

Integration Steps
Download ASP Request Form


Related links:

What is a Digital Signature?
e-Sign Service
Benefits of e-Sign Service
Contact Us