e-Sign is a key digital platform for providing online digital signature service, which can be integrated with service delivery applications via an Application Programming Interface (API) to facilitate an e-Sign user to digitally sign a document. Using authentication of the Aadhaar holder through Aadhaar e-KYC service, online electronic signature service is facilitated. e-Sign service facilitates instant signing of documents online by citizens in a legally acceptable form. Using this, an Aadhaar holder can electronically sign a form/document anytime, anywhere, using device such as Personal Computer or Laptop or Mobile. CDAC is providing e-Sign service with the name ‘e-Hastakshar’.
As per Information Technology (IT) Act, 2000, Controller of Certifying Authorities (CCA) issues license and regulates the working of Certifying Authorities (CA). The CAs issue digital signature certificates for electronic authentication of users. Recently, CCA has released e-Sign 3.0 specifications based on Aadhaar offline eKYC wherein XML is enabling offline mode for obtaining eKYC. This requires one-time registration between e-Sign user and e-Sign Service Provider and supports two factor authentication while e-Signing.