I am not a cryptographer or even remotely capable of assessing the validity of what I’m about to say, but I’ll say it anyways.
The current set of cryptography techniques all seem to be increasingly clever and obfuscated iterations on the pattern of ROT13. They represent security through obscurity in that they always seem to be compromised over time, after enough knowing sets of eyeballs have looked at them. They are initially “secure” because they are so complex that no one (usually including the inventor(s)) can understand the end-to-end implications of every part of them. For example: Why do some elliptic curves allow creation of secure cryptographic rotors?