An electronic signature on its own is not a secure signature. Anyone can modify, change, delete or forge the signature. There is also no way to authenticate the signature as being authentic. However, you can make this type of signature secure by converting it into a digital signature. A digital signature will require creating different digital certificates.
Issue Digital Certificates after Converting an Electronic Signature
After converting an electronic signature into a digital signature, you will have to issue digital certificates. Digital certificates will be required for any person who needs to digitally sign or access documents and files. Each person will need to have their own private key to sign and encrypt the documents. People who receive the documents and files will need to have a digital certificate containing the public key of the person who signed the documents and files. The public key is used to decrypt the documents and files and serves to authenticate them.