First, for this vector, they would have to know before hand that it's random numbers. I don't tell anyone I do this. I also use a random combination of words i

First, for this vector, they would have to know before hand that it's random numbers. I don't tell anyone I do this. I also use a random combination of words instead of just characters; Yellow Mountain Bad Hernia 13 Call center employees will generally think it's my own connotations (if it's school they will think there is a yellow mountain nearby and maybe I had a hernia... words tend to have associations)