DALLAS (3/18/08)--TNB Card Services has joined the Payment Card Industry (PCI) Security Standards Council to develop the PCI Data Security Standard (PCI DSS), which aims to improve the security of card processing for credit unions. PCI DSS is a security standard founded by Visa Inc., MasterCard, American Express, JCB and Discover. The council developed requirements for security management, policies, procedures, network architecture, software design and other protective measures. TNB will have access to the latest payment card security standards from the council and can provide feedback on the standards. TNB Card Services has been owned and directed by credit unions since 1976 and serves more than 500 financial institutions.