1. Introduction The NSDL e-Lock Sign App (now often referred to under the CDSL Ventures, Ltd. brand following the merger of NSDL e-Governance into CDSL Ventures) is a secure mobile application designed for Aadhaar-based digital signatures . It enables Indian citizens to sign electronic documents remotely using the biometric or OTP authentication linked to their Aadhaar number, without needing a physical USB token (Dongle).
NSDL e-Lock Sign remains popular due to its long history and government procurement acceptance. The NSDL e-Lock Sign App is a secure, legally valid, and convenient tool for Aadhaar-based digital signing on Android devices. It eliminates the need for expensive USB tokens and enables remote, paperless workflows.
For further technical support, contact CDSL Ventures helpdesk at or email support@cdslventures.com .