Now the pen and paper method are getting abolish and transfer their method to digital signature which consists of signer identity and records an obligatory assurance to the document. A mathematical scheme for representing the legitimacy of a document or digital message is a digital signature. A legitimate digital signature provides a receipt reason to consider that it created by the identified sender and the sender can’t deny as haven’t sent the message and it was not possible to alter in transit. It is using commonly in financial distribution, software distribution and other fields where having important to spot tampering or forgery.
It is using frequently for implementing e signatures, but keep on mind that all e signatures use digital signatures. A type of asymmetric cryptography employs by digital signature. If a message is sending through a non safe way, than digital signature provides believe to the receiver that the message was came from the claimed sender. In many instances for example engineering companies, digital signature and seals provide another layer of security and validation.
Digital signature and seals are equal to handwritten stamped seals and signatures and digital signatures are equal to traditional handwritten signatures, where digital signatures are difficult to fake when compared with handwritten signature. It provides non-repudiation, where the signer cannot claim successfully for his/her not signed the message. Digital signed messages are anything of bit string represent able such as e-mail, contracts, message sent through other cryptographic protocol. For digital signature, two properties are required. The first property is fixed private key and fixed message generates authenticity of a signature which can be verified by using corresponding public key.
The second property is for a party it is essential to generate valid digital signature without knowing the private key of the party. Digital signature is using for three main reasons such as efficiency – digital signature is shorter which saves time and energy, compatibility – messages are normally bit strings, but some schemes of signature function on other domains so a jumble function is using to change an arbitrary input in to correct format and the final reason is integrity – the content of the digital signature can’t able to change or tamper. Now, infopath signing is using to sign infopath forms in their inhabitant set-ups.
Many organizations are now moving away from the paper documents to authenticity stamps and ink signatures. For them digital signatures provided added assurance and evidence to identity and provenance. Now, government sectors are also slowly moving their paper document process in to electronic version of the private and public laws, congressional bills and budget with digital signatures.
It is essential to follow security precautions to avoid misuse of digital signature. Always keep the private key secret, it can store on the user’s computer and protect it by using local password. It is having two advantages, one is the user can use the particular computer to sign documents and the other is private key security depends completely on the computer security. It is recommended to use smart card for storing private key.
InfoPath signing has been using to validate the message source. Digital signatures are not possible to copy from one document to another since it cryptographically unite and electronic identity and electronic document. So, usage of digital signature is safer and easier.