1.   -- Internet administrators are alarmed over a wave of computer break-ins by sophisticated hackers.

2.   But a DCC chat also can give a sophisticated hacker access to your computer.

3.   But there is evidence that more sophisticated hackers are now at work.

4.   So while there are sophisticated hackers out there, the majority are cookbook hackers, following directions found on Web sites, using tools downloaded from the Web.

5.   That assault was fended off, but the next day a more sophisticated hacker attack knocked the company off the Internet.

6.   To obscure their identities, sophisticated hackers will first log into a home network software before launching an attack against their ultimate target.

7.   Security experts say more sophisticated hackers can even change messages in transit, without the sender or recipient ever knowing.

8.   Sophisticated hackers used the Internet on Christmas Day to break in and take over the computer of a well-known computer security expert, The New York Times reported.