Imagine asking a group of spectators to think of themselves as software engineers who have
been given the job of encrypting a special massage (can be anything like date of birth, pin
code of their phone, password and other such important information). You need nothing but
a single piece of paper and a pen.

Effect

Imagine yourself taking a single piece of paper and stripping them into 4-6 equal parts then
asking two of the spectators to write the special messages by dividing the complete massage
into two parts and then asking the other participants to write gibberish on their piece of paper
then putting all together in their hand and giving all of them a good shake so that no one
knows which is which. Thus, effectively encrypting the special massage. Now you pretend to
be the hacker and you will try to break their encryption by hacking into their mind!