The present disclosure envisages a computer implemented method that provides an intended content recipient with selective access to an encrypted data file, subject to successful authentication of the intended content recipient's unique personal identity. An intended content recipient is enabled to create a verifiable personal identity for himself by using a National Identification Number (NIN), and link the NIN to an identifier identifying a computer-based device, so that a challenge (preferably in the form of an OTP having a time-validity) for verifying the identity of the intended content recipient could be delivered to both the mobile phone and the email ID linked to the corresponding NIN. Subsequently, when the intended content recipient authenticates himself and validates the fact that the email ID and mobile phone number linked to the NIN are indeed accessible to him, the remote server enables the intended content recipient to access the encrypted data file.