Background
There is scant formal literature on the issue of security through obscurity. Books on security engineering will cite Kerckhoffs' doctrine from 1883, if they cite anything at all. For example, in a discussion about secrecy and openness in Nuclear Command and Control:
- he benefits of reducing the likelihood of an accidental war were considered to outweigh the possible benefits of secrecy. This is a modern reincarnation of Kerckhoffs' doctrine, first put forward in the nineteenth century, that the security of a system should depend on its key, not on its design remaining obscure.
In the field of legal academia, Peter Swire has written about the trade-off between the notion that "security through obscurity is an illusion" and the military notion that "loose lips sink ships" as well as how competition affects the incentives to disclose.
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.
Read more about this topic: Security Through Obscurity
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