the only proven secure crypto is the one-time pad. rest is all junk relying on computation times to stay 'secure'. and this onee time pad you can never send ove

the only proven secure crypto is the one-time pad. rest is all junk relying on computation times to stay 'secure'. and this onee time pad you can never send over a wire to anyone because of chicken-egg problem. so this would be something you would need to exchange offline for decryption to be possible. if you are not doing that, best stick with known good encryption schemes. that being said you can implement a lot of encoding schemes like you say in ways that make it arbirarily hard for people to decide what is junk and what is data, to make it nearly impossible to crack especially if you say do that xor with random values etc. because if you'd receive a data intercept you have a hard time to rebuild the data from the junk and then decode it