Teach your children the story of Ali Baba: how he managed to convince the NSA that he knew where Waldo was without disclosing his location, how later he joined him for a dinner with other fellow cryptographers, how they discovered their banquet was already been paid by someone who wanted to stay anonymous, and how they figured out a way to assess if the Amphitryon was among the table companions or was the NSA itself - and other variations around advanced concepts in cryptography.

.:plaintext.crypto.lo.gy->