How do Digital Signatures Work

1. How do Digital Signatures Work Difference between electronic signatures and digital signatures Most eSignature technologies offer some level of identity authentication and allow users to sign documents digitally. Where they both differ is in the level of security. eSignatures often use common electronic authentication methods to verify the signer’s identity, such as an email address, a corporate username/ID, or a phone number/PIN. Digital signatures, on the other hand, are considered the most secure because they use public key infrastructure (PKI) certificates from a Certificate Authority (CA). CA is an independent Trust Service Provider, which uses sophisticated cryptographic techniques to ensure the security of public and private keys. Both the sender and the recipient signing the documents must agree to use a given CA. Another point of difference between both electronic signatures and digital signatures is their acceptance. While eSignatures can vary per industry, geographic, and legal acceptance, digital signatures comply with all the major international regulations such as GDPR in the EU and ESIGN Act in the US. How do digital signatures work? The primary reason why digital signatures are considered the most secure and preferred over other cryptographic techniques is that they ensure a document has not been altered in any manner when it is returned to the sender and that the sender cannot deny having sent it. This usually happens by establishing audit trails that provide documentary evidence of the sequence of signing activities that took place. In pure legalese, they offer integrity, authenticity, and non-repudiation for digital documents or messages. Digital signatures use PKI, which involves using two related keys, a public key, and a private key. When combined, these two keys help in encrypting and decrypting a message using strong cryptography algorithms. The public and private keys offer the signer a digital identity, which ensures that the individual who is signing a document is really who they say are. They generate a digital signature, as well as a timestamp of when the document was signed using the key. These keys are stored at a trusted CA. For more information: https://rsign.com/glossary/how-do-digital-signatures-work