Password or biometric authentication using iris or fingerprint or voiceprint should be required to open the confidential document containing personal data to prevent hacking attempts by third parties via man-in-the middle attack or Distributed Denial of Service attack. Screenshots of signatures should be disabled and forwarding of signature via chat apps like WhatsApp and Telegram should be disabled to prevent impersonation and hacking attempts by third parties. Kindly refer to the LastPass screenshot app for this additional feature. If amendments of signature or any parts of the documents are required, it needs to ask for the permission of the sender or owner before allowing to proceed.