To be precise: a program without digital signature is in monitoring state: safe. In an unmonitored state; It is also safe; (This involves a question of monitoring and non-monitoring, abbreviated as:
Programs without digital signatures are secure. Even if it is a monitoring keyboard, even if it records information under the monitoring of security software, it will be automatically cleared when it is turned off. Even if it is recorded and not cleared, the anti-virus software will pop up a blocking dialog box during the sending process to show concern ~ It is king to scan the disk regularly and clean the registry regularly if you want information not to be leaked!