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Logical Relations for Encryption

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Application: Protocol Encoding<br />

Encode:<br />

— Sending of a message by the message itself<br />

— Receiving of a message by a function<br />

— Network and attacker by a context<br />

E.g.,<br />

1. A → B {i} k<br />

2. B → * i mod 2<br />

• p = new k in 〈{i} k , λ{x} k . x mod 2〉<br />

• Network(p) = # 2 (p) # 1 (p)→* i mod 2

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