Sorry, but this is not good advice. Widely-used crypto implementations have had the benefit of years of analysis by dozens of high-expertise stakeholders who ha

Sorry, but this is not good advice. Widely-used crypto implementations have had the benefit of years of analysis by dozens of high-expertise stakeholders who have a lot to lose should the crypto fail. Even that isn't always enough to catch all weaknesses and vulnerabilities. This cowboy-programming attitude being extended to security is no small part of why we are so vulnerable as a society to attacks on our computer systems that can compromise our core infrastructure[1], our secrets[2], and our economic security[3]. [1] Think weeks-long country-wide power outages [2] Think juicy blackmail material on anyone with their hands on levers of power. Look at the damage that North Korea's attacks did to Sony Pictures, for example. [3] Think small-scale attacks on services that even a single major company, or many small companies, rely on.