When you enter the booking portion of the US Airways Vacations site we protect you with state-of-the-art Secure Socket Layer (SSL) technology that is utilized through the most popular browsers including Netscape and Microsoft Explorer. This technology provides advanced encryption of the data transmitted between your computer and our server. Encryption means that your information, including credit card numbers, are converted into bits of code before being securely sent over the Internet. This scrambled data cannot be read as it travels through the Internet.