Bank of Oklahoma is committed to making sure that your online banking is safe and secure. With our security infrastructure in place, we are confident that access to your accounts is private and secure.

Encryption
Encryption helps protect your private information by scrambling it so that it cannot be intercepted and read by anyone else. When you visit a site that requires encryption, your browser will display a key or a lock. If you are not in a secure area, the key or lock will be broken.

Until recently, no encryption requiring a key longer than 40 bits was permitted to be exported outside of the United States and Canada. 40-bit encryption is known as international level or export-grade encryption. The significantly stronger 128-bit encryption is called U.S. and Canada only level or domestic-grade encryption.

Most browser versions let you easily check your level of encryption. For Netscape browsers: Earlier versions have a key in the bottom left-hand corner of your screen with one tooth for 40-bit or two teeth for 128-bit encryption. Later versions show a lock on the left side of the status bar. However, the lock does not make any visual distinction between 40 and 128-bit encryption. In these versions, to check your level of encryption, go to the "View" menu, select "Page Info", and look under the line that begins "Security."

For Microsoft browsers: To check your level of encryption, go to the "File" menu, select "Properties", and then select "Security." Another way is to select "Help" then "About Internet Explorer."

If you are currently using a browser with 40-bit encryption, we'd like you to upgrade now. With the release of 128-bit encryption capability and digital identity verification, you can download a a Netscape or Microsoft browser that provides 128-bit encryption.

Other Security Features
Our firewall protects Bank of Oklahoma's systems by allowing entry only to those who are authorized.

For digital identity verification, the Online Banking system has a digital server certificate by VeriSign that your browser uses each time you sign on to verify that indeed you are connected to BOk's Online Banking.

Your Role in Security
While Bank of Oklahoma works to protect your accounts, you also have a part. There are a number of steps you can take to ensure that your online experience on the Internet is safe and secure.

• Most importantly, don't reveal your online Personal Identification Number to anyone. Your online PIN is designed to protect the privacy of your online information, but it will only work if you keep it private. If you think your online PIN has been compromised, change it immediately online.
• Don't leave your computer unattended if you are in the middle of an Online Banking session.
• Once you have finished your Online Banking session, always sign off before visiting other sites on the Internet.
• If anyone else is likely to use your computer, clear your browser cache or turn off your browser and re-start it in order to eliminate copies of web pages that have been stored on your hard drive. How you clear your cache will depend on the browser and version you have. This function is generally found in the browser's preferences menu.
• Bank of Oklahoma recommends that you use a browser with 128-bit encryption.