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I have a secret. I want to share this secret with only my best friend. I do this by telling the secret to everybody I meet, whether they look like my friend o
by ctz 12y ago
I have a secret. I want to share this secret with only my best friend. I do this by telling the secret to everybody I meet, whether they look like my friend or not. Eventually I meet my friend, and tell them too.
This is confidentiality without authenticity. It is an incoherent idea.
- tptacek 12y agoIt's incoherent at a high level, and it stays incoherent as you delve deeper into the theory. For instance, systems that lack authentication tend to lose confidentiality to error oracles.