A Digital Signature Certificate online is likened to a physical signature, but instead, it takes an electronic format, which helps them protect the integrity and authenticity of the signed digital files. In so doing, a digitally signed certificate acts as a safe device to verify the identity of the signatory and helps secure the document against any alterations using encryption technology.
Thus, in the event that a recipient receives an email with an attachment that has been digitally signed by a particular certificate, that certificate guarantees the recipient that the owner of the certificate is indeed the person who sent the document. Such certificates are found in a number of different industries, such as when submitting government papers, banking, and business submissions.