The OTC system had other benefits. Most major Australian corporations had accounts on the system. Breaking into an account requires a username and password; find the username and you have solved half the equation. Minerva account names were easy picking. Each one was composed of three letters followed by three numbers, a system which could have been difficult to crack except for the choice of those letters and numbers. The first three letters were almost always obvious acronyms for the company. For example, the ANZ Bank had accounts named ANZ001, ANZ002 and ANZ002. The numbers followed the same pattern for most companies. BHP001. CRA001. NAB001. Even OTC007. Anyone with the IQ of a desk lamp could guess at least a few account names on Minerva. Passwords were a bit tougher to come by, but Mendax had some ideas for that. He was going to have a crack at social engineering. Social engineering means smooth-talking someone in a position of power into doing something for you. It always involved a ruse of some sort. Mendax decided he would social engineer a password out of one of Minerva's users. He had downloaded a partial list of Minerva users another PI hacker had generously posted for those talented enough to make use of it. This list was maybe two years old, and incomplete, but it contained 30-odd pages of Minerva account usernames, company names, addresses, contact names and telephone and fax numbers. Some of them would probably still be valid. Mendax had a deep voice for his age; it would have been impossible to even contemplate social engineering without it. Cracking adolescent male voices were the kiss of death for would-be social engineers. But even though he had the voice, he didn't have the office or the Sydney phone number if the intended victim wanted a number to call back on. He found a way to solve the Sydney phone number by poking around until he dug up a number with Sydney's 02 area code which was permanently engaged. One down, one to go. Next problem: generate some realistic office background noise. He could hardly call a company posing as an OTC official to cajole a password when the only background noise was birds tweeting in the fresh country air. No, he needed the same background buzz as a crowded office in downtown Sydney. Mendex had a tape recorder, so he could pre-record the sound of an office and play it as background when he called companies on the Minerva list. The only hurdle was finding the appropriate office noise. Not even the local post office would offer a believable noise level. With none easily accessible, he decided to make his own audible office clutter. It wouldn't be easy. With a single track on his recording device, he couldn't dub in sounds on top of each other: he had to make all the noises simultaneously.