1, open the signature design, the mobile phone enters the personalized signature App, and then open the signature design function.

2. Select Start Design. After entering the signature design App, enter your name and select Start Design function.

3. Choose a signature. After the signature design is successful, select the appropriate signature to use.

To sign, that is, to write one's name, especially to express agreement, recognition, responsibility or obligation. There are more interpretations of signature, such as digital signature, artistic signature and so on. Or a star's meaningful signature, also called signature. Signature is a kind of signature, because the signature is used the most, so the signature is often corrupted into a signature.

Traditionally, signature is not synonymous with signature. The signature should be readable, but the signature is unnecessary. People have certain requirements for signature, and the signature represents the consent, which has legal effect and gives the document authenticity in law.

The function of signature is that the file itself can prove that it has not been tampered with, provided that it first shows its identity with its own certificate (specifically, the certificate chain). Otherwise, people who tamper with documents will give themselves a certificate. For the signer, you can only know that the document has not been modified, but you don't know whether the signer is the one who tampered with the document.

For unsigned files, if the file creator publishes the hash of the file, it can also verify whether the file has been changed, but the file itself cannot prove its function.