Opera Software ASA has added a filter that blocks phishing sites to
its Web browser software, following the example set by rivals Microsoft
Corp. and Mozilla Corp.

In version 9.1 of the Opera Web browser, released
Monday, the company introduced a phishing filter that uses information
from PhishTank and GeoTrust to help protect users from being duped by

PhishTank, overseen by open-source group OpenDNS, is a collaborative
clearinghouse that allows anyone to submit and track data about
phishing sites. GeoTrust provides digital certificates.