yes. The object of digital signature is any form of data, such as text, pictures, audio, video, etc. No matter what the form, the original information is the signature object, so the object of digital signature is the original text. Digital signature uses the principle of cryptography to encrypt the original information of a digital file with a private key to ensure the authenticity, integrity and non-repudiation of the information. Digital signature is a digital means of identity authentication and an important tool to provide us with secure electronic transaction services.