It would be interesting if these kind of companies (aviation, car companies) were forced to publicly disclose the patch they are applying in order to fix a brok

It would be interesting if these kind of companies (aviation, car companies) were forced to publicly disclose the patch they are applying in order to fix a broken piece software. Maybe then they'd be more careful because of the extra scrutiny and the potential leaking of secrets. On the other hand, maybe then they'd patch as little as possible, although in this case, if a second patch would be required, a very hefty fine could be forced onto the company, or possibly force a full disclosure of all the relevant source code. Maybe the Blockchain could be used for some accountability here, where hashes of the blobs of all the software in the system, including the secret one, could be used as a means to prove that only a specific section of a codebase has been altered.