# Concept of “guessed ID” in Authenticated Identity-Based Encryption

In Authenticated Identity-Based Encryption by Ben Lynn, in Proof of Integrity (section 4.3) and Proof of Security (section 4.4), I cannot grab the concept of "guessed ID" . Because encryption differs according to "guessed ID", I am unable to know how it works.

Is there anyone who can help explain this term and how it affects the proof?

• Please take a look at my edits. Try and include links and concrete references within your question. This saves us a lot of work and increases your chance of getting good answers. I've narrowed down your last question as the proofs are 3 pages in size; we cannot be expected to break that down even if we knew what you aren't able to grab. – Maarten Bodewes Jun 10 '16 at 9:33

"Guessed ID" means ID that the oracle guesses the attacker algorithm $A$ will attack.