A method for ensuring the trustworthiness of software source code (source code) is provided, wherein two software developers sign the source code produced by said software developers. A compiling device checks, on the basis of the public signature keys of the software developers, whether the source code is trustworthy and produces a binary code from the source code. The produced binary code is signed by the compiling device, and the signed binary code together with the public signature key of the compiling device is made available for further use. The signed binary code is therefore likewise trustworthy.