Table of contents
The channel coding theorem and the security of binary randomization
Context: Theory of variable privacy
Protocol as channel
Attacks on randomization - repeating the question
Is the following an attack?
Theorem: Channel codes are DRQS attacks and vice versa
What kind of information transfer do DRQS attacks provide?
Shannon (1948) Channel Coding (“second”) Theorem Existence result; tight upper bound on transmission efficiency
Existence of reliable DRQS attacks
Types of attacks
Theorem: The rate of a reliable PRQS attack is tightly bounded above by protocol capacity
Theorem: Lower bound on total queries for arbitrarily small error
We have shown that
Why our approach is so powerful
This work was influenced by conversations with