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Computer Break-in Artists Convention

Hackers demonstrate there skills in Vegas…

LAS VEGAS  - Even the ATM machines were suspect at this year’s Defcon conference, where hackers play intrusion games at the bleeding edge of computer security.
With some of the world’s best digital break-in artists pecking away at their laptops, sending email or answering mobile phones could also be risky. Defcon is a no-man’s land where customary adversaries - feds vs digital mavericks - are supposed to share ideas about making the internet a safer place. But it’s really a showcase for flexing hacker muscle.

This year’s hot topics included a demonstration of just how easy it may be to attack supposedly foolproof biometric safeguards, which determine a person’s identity by scanning such things as thumb prints, irises and voice patterns.

Banks, supermarkets and even some airports have begun to rely on such systems, but a security analyst who goes by the name Zamboni challenged hackers to bypass biometrics by attacking their backend systems networks. "Attack it like you would Microsoft or Linux," he advised.

Radio frequency identification tags that send wireless signals and are used to track a growing list of items including retail merchandise, animals and US military shipments also came under scrutiny.

A group of twentysomethings from Southern California climbed onto the hotel roof to show that RFID tags could be read from as far as 21 metres. That’s important because the tags have been proposed for such things as U.S. passports, and critics have raised fears that kidnappers could use RFID readers to pick traveling U.S. citizens out of a crowd.

RFID companies had said the signals didn’t reach more than six metres, said John Hering, one of the founders of Flexilis, the company which conducted the experiment.

"Our goal is to raise awareness," said Hering, 22. "Our hope is to spawn other research so that people will move to secure this technology before it becomes a problem."

Erik Michielsen, an analyst at ABI Research, chuckled when he heard the Flexilis claims. "These are great questions that need to be raised," he said, but RFID technology varies with the application, many of which are encrypted. Encryption technology uses an algorithm to scramble data to make it unreadable to everyone except the recipient.

Also on hand at the conference was Robert Morris, former chief scientist for the National Security Agency, to lecture on the vulnerabilities of bank ATMs, which he predicted would become the next "pot of gold" for hackers.

The internet had become "crime ridden slums," said Phil Zimmermann, a well-known cryptographer who spoke at the conference. Hackers and the computer security experts who make a living on tripping up systems say security would be better if people were less lazy.

To make their point, they pilfered internet passwords from convention attendees.

Anyone naive enough to access the internet through the hotel’s unsecured wireless system could see their name and part of their passwords scrolling across a huge public screen.

It was dubbed the "The Wall of Sheep."

Among the exposed sheep were an engineer from Cisco Systems, multiple employees from Apple Computer and a Harvard professor.

An annual highlight of the conference is the "Meet the Feds" panel, which this year included representatives from the FBI, NSA and the Treasury and Defence departments. Morris and other panel members said they would love to hire the "best and brightest" hackers but cautioned that the offer would not be extended to lawbreakers.

During the session, Agent Jim Christy of the Defence Department’s Cyber Crime Center asked the audience to stand.

"If you’ve never broken the law, sit down," he said. Many sat down immediately - but a large number appeared to hesitate before everyone eventually took their seats.

OK, now we can turn off the cameras, Christy joked.

Some federal agents were indeed taking careful notes, though, when researcher Michael Lynn set the tone for the conference by publicising a vulnerability in Cisco routers that he said could allow hackers to virtually shut down the internet.

Lynn and other researchers at Internet Security Systems had discovered a way of exploiting a Cisco software vulnerability in order to seize control of a router. That flaw was patched in April, but Lynn showed that Cisco hadn’t quite finished the repair job - that the same technique could be used to exploit other vulnerabilities in Cisco routers.

Cisco and ISS went to court to try to stop Lynn from going public, but Lynn quit ISS and spoke anyway. In the wake of his decision, Lynn had become the subject of an FBI probe, said his attorney Jennifer Granick.

Many at the conference praised Lynn.

"We’re never going to secure the net if we don’t air and criticise vulnerabilities," said David Cowan, a managing partner at venture capital firm Bessemer Venture Partners.

And the vulnerabilities are plenty.

During his session on ATM machines, Morris said thieves had been able to dupe people out of their bank cards and passwords by changing the software in old ATM machines bought off eBay for as little as $US1000 ($A1310) and placing the machines out in public venues.

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