An exemplary method involves receiving a request to process a file comprising computer instructions. The file may be a script, a source code file, a binary file, etc. The method also involves identifying a digital signature embedded in comments within the file. The method also involves attempting to validate the digital signature. If the digital signature is validated, the file is processed. If the digital signature is not validated, the file is not processed. The file may include multiple digital signatures. When this occurs, the file may be processed only if all of the multiple digital signatures are validated. Alternatively, the file may be processed if any of the multiple digital signatures are validated.