Install and maintain a firewall configuration to protect cardholder data Not use vendor-supplied defaults for system passwords and other security parameters Protect cardholder data Protect stored cardholder data Encrypt transmission of cardholder data across open, public networks.
Maintain a vulnerability management program Use and regularly update anti-virus software Develop and maintain secure systems and applications Implement strong access control measures Restrict access to cardholder data by business need-to-know Assign a unique ID to each person with computer access.
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