security news virus news hacking news hacker trojan underground headlines newsticker security news antivirus exploit denial of service DDoS advisories trojan backdoor sniffer smurfwindows securityXP security security products security books security tips security faq authentication computer security crack crackers crash cryptography denial of service DOS email virus alerts encrypting file system encryption exploits firewall firewalls hack hacks hack files hack links hacked webpages hacker hackers hacking hacking files hacking links hot fixes icmp intruder intrusion detection news ip spoof Kerberos key logger logon microsoft security NT nt security nt server ntsecurity ntshop password password crackers patches permissions phreaking boxes port monitors proxy proxy servers