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A cryptosystem should be secure even if everything about the system, except the key, is public | 188 comments | Create New Account

Comments belong to whoever posts them. Please notify us of inappropriate comments.

A cryptosystem should be secure even if everything about the system, except the key, is public

Authored by: Anonymous on Wednesday, June 20 2012 @ 01:39 PM EDT

Not exactly.

If the security of your system is suspect, then security by obscurity (SbyO)
might be your best hope. It may succeed for long enough to replace the security
system with something else.

It's where people try to use SbyO for their long term protection that it is only
going to work if no-one has enough incentive to break it.

If you know that your security system is very strong, then SbyO provides an
additional obstacle to an attacker - but getting to the point where you can
*know* that your security is very strong requires open analysis for a long time
(so using SbyO after that point is not much of an obstacle any more).

John Macdonald

[ Reply to This | Parent | # ]

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