What is Digital Signature?

What is Digital Signature?
Digital signature are like electronic “fingerprints”. In the form of a coded message, the digital signature securely associates a signer with a document in a recorded transaction.


It use a standard, accepted format, called Public Key Infrastructure (PKI), to provide the highest levels of security and universal acceptance. They are a specific signature technology implementation of electronic signature (eSignature).


The broad category of eSignature encompasses.the category includes digital signatures, which are a specific technology implementation of electronic signatures.
Both digital signatures and other eSignature solutions allow you to. Sign documents and authenticate the signer.


The use of digital signature technology for eSignatures varies significantly between countries that follow open, technology- neutral eSignature laws.Digital signatures like handwritten signatures are unique to each  signer. It is a solution providers follow a specific protocol called PKI.


PKI requires the provider to use a mathematical algorithm to generate two long numbers called keys. One key is public and another one is private. When a signer electronically signs a document, the signature is created using the signer’s private key, which is always securely kept by the signer.


The mathematical algorithm acts like a cipher, creating data matching the signed document called a hash and encrypting that data.the resulting encrypted data is the digital signature. It is also market with the time that the document was signed. If the document changes after signing the digital signature is invalidated.


To protect the integrity of the signature, PKI requires that the keys be created, conducted and saved in a secure manner and often requires the services of a reliable Certificate Authority (CA).

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