Page "Security through obscurity" Paragraph 5

The principle of security through obscurity was more generally accepted in cryptographic work in the days when essentially all well-informed cryptographers were employed by national intelligence agencies, such as the National Security Agency.

Now that cryptographers often work at universities, where researchers publish many or even all of their results, and publicly test others ' designs, or in private industry, where results are more often controlled by patents and copyrights than by secrecy, the argument has lost some of its former popularity.

An example is PGP released as source code, and generally regarded ( when properly used ) as a military-grade cryptosystem.

The wide availability of high quality cryptography was disturbing to the US government, which seems to have been using a security through obscurity analysis to support its opposition to such work.

Indeed, such reasoning is very often used by lawyers and administrators to justify policies which were designed to control or limit high quality cryptography only to those authorized by a given state.