Digital signatures
Digital signature Digital signature is a digital analogue of a pen-and-ink signature on a physical document. The purpose of digital signature is to solve the following scenario. Alice has a digital document and wants to attach some “proof” that can be used to prove that she had approved this document. Therefore, digital signature can be recognized as an analogue to her handwritten signature on an ordinary document. Asymmetric Signing Algorithms Asymmetric-key cryptography is based on an exchange of two keys — private and public. Since the public key is accessible to all, anyone could get yours and then contact you pretending to be someone else. Luckily, authentication problems were solved early in the internet age with digital signatures. Two major parts of a digital signature in public-key cryptography are the sender’s private key and a hash. In simple terms, it’s a condensed version of a message. Regardless of the file type or its size, a hash is only 5-20 symbols long. Keep in