FRAMINGHAM, Mass. (7/1/08)--As of yesterday, retailers accepting payment card transactions are required to install firewalls to protect Web applications from hackers. The new Payment Card Industry Data Security Standard (PCI DSS) 6.6 aims to protect the privacy of consumer information by requiring retailers to place firewalls in front of Web applications or to conduct application code reviews (CIO.com June 30). The standard, created by credit card companies including MasterCard and Visa, was formerly a best practice. Credit unions have been affected by numerous data breaches that have compromised members’ credit or debit card accounts. The breaches have cost credit unions thousands of dollars to replace cards. News Now reported today that a breach at an unknown restaurant chain affected 612 members of Envision CU, Tallahassee, Fla.