Do you mean the mobile phone or the computer? For mobile phones, please download your own direct signing tool with your own mobile phone model. Computers also have this kind of thing, but it doesn't work well. By the way, there is nothing wrong with not having a digital signature, but it has not been evaluated by Microsoft. 360 is intended to block viruses, but at present, many domestic software authors don't care about digital signatures, so they don't care too much. As long as they don't download from bad websites, they are generally fine.