> ...in defiance of a widely accepted cryptographic principle holding that obscurity is detrimental to security. Security isn't my field, but my understanding

> ...in defiance of a widely accepted cryptographic principle holding that obscurity is detrimental to security. Security isn't my field, but my understanding is that this is a bit of a common misunderstanding re: Kerckhoff's Doctrine / Security through Obscurity. The idea being that keeping something like a Cipher's algo secret is not necessarily detrimental to security, but that relying on obscurity to provide security rather than the merits of the algo is the problem. Surely, opening the algo allows the community to audit it, but a group of experts sworn to secrecy can also do this (e.g. NSA's Suite A ciphers) EDIT: I should add that opening TETRA is almost certainly a good idea if they can update it with help of the community.