Hi tech vs Low tech

Low-tech
I asked one of my coworker (let's call him E) to shadow me to do the alter on the production database. There was a change on database password 2 days ago. I proudly showed him that I wrote down the password on the post-it with my own encryption, the mapping from english character to thai character and english number to thai number.
He said...woowowow.. to me.

Hi-tech
Later in the day, another engineer asked him to shadow her to do something, but she didn't know the new password yet. So E went back to his desk, decrypted the password. I noticed that E used encryption program to encrypt and decrypt the password.
I said ...woowowow... to myself.