Payment Card Industry Data Security Standard (PCI DSS)

TNS is a Level 1 PCI DSS certified service provider. With a comprehensive risk management and compliance framework in place, TNS has consistently maintained this certification across all its in-scope environments globally for over 10 years.

TNS’ Attestations of Compliance (AoCs) are available upon request through the Account Manager or by sending an email to TNS’ certifications are also listed on the relevant Visa and Mastercard websites as “Transaction Network Services (TNS)”.

The key aspects of PCI DSS are:

Build and maintain a secure network and systems

  • Install and maintain a firewall configuration to protect cardholder data.
  • Do 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 

  • Protect all systems against malware and regularly update anti-virus software or programs.
  • Develop and maintain secure systems and applications.

Implement strong access control measures 

  • Restrict access to cardholder data by business need-to-know.
  • Identify and authenticate access to system components.
  • Restrict physical access to cardholder data.

Regularly monitor and test networks 

  • Track and monitor all access to network resources and cardholder data.
  • Regularly test security systems and processes. 

Maintain an information security policy

  • Maintain a policy that addresses information security for all personnel

To learn more about PCI DSS, please visit


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Details of your local TNS representative can be found on our contact page