pedestrian hacker

Noun

 * 1) A typical hacker; a person who uses a computer to gain unauthorized access without using extraordinary equipment or brilliance.
 * 2)  Someone who is mediocre at their craft.
 * 1)  Someone who is mediocre at their craft.
 * 1)  Someone who is mediocre at their craft.
 * 1)  Someone who is mediocre at their craft.

Usage notes
The term is often used in indications of how secure a cryptographic system is, specified as the amount of time it would take a pedestrian hacker to break the code.