2Checkout Services are PCI DSS Level 1 Certified (Payment Card Industry Data Security Standard). PCI DSS is the most important security standard for the card payment industry. All transactions are made using a SSL connection (128 bytes) provided by Verisign.
The data sent from your browser to 2Checkout servers is always encrypted. All 2Checkout servers are certified McAfee Secure and scanned daily by ScanAlert for known vulnerabilities. Additionally 2Checkout does not store any credit card sensitive information.