St. Louis, Jan. 21, 2016 -- Parameter Security, an ethical hacking and information security firm, is proud to announce its Sentinel PCI service has successfully completed the PCI Scanning Vendor Compliance Testing and Approved Scanning Vendor certification. This credential affords Parameter Security the authority to perform external vulnerability scanning services to validate adherence with the external scanning requirements of PCI Data Security Standard (PCI DSS) for any organization that stores, processes or transmits payment cardholder data.