A Digital Signature Certificate (DSC) is the digital equivalent of a physical certificate and contains information about the user that is used to digitally sign electronic documents. DSCs can be used for signing, encrypting, or both and are issued by licensed Certifying Authorities for periods of 1 to 3 years. DSCs allow documents to be digitally signed, providing assurance of the signer's identity and that the data has not been altered. They are required for electronic documents and legally admissible in court.