Signal’s “homebrew protocol” has been reviewed by professional cryptographers and judged secure. It is designed from known cryptographic primitives. In short, it’s as secure as you’re going get on general purpose hardware.

It’s a matter of picking the right Ferrari and doing your research on the condition/history of the car you’re thinking of buying. My former F430 spider needed minimal maintenance, under $2,000/yr (tires/oil changes) and had two issues: leaking headers (covered by Ferrari) and a ghost in the TPMS system. The latter…