The following describes the security measures we take to protect your information on the Internet:
Basic encryption involves the transmission of data from one party to another. The sender encodes the data by scrambling it, then sends it on. The receiver must decode the data with the correct "decoder" in order to read and use it.
The effectiveness (or level of security) for encryption is measured in terms of how long the key is - the longer the key, the longer it would take for someone without the correct "decoder" to break the code. This is measured in bits, e.g. 40-bit encryption, the level of encryption used with many ordinary browsers, versus the level of encryption recommended to use Account Online. For a 40-bit key, there are 240 possible combinations. For a 128-bit key, there are 2128 possible combinations.
Sometimes we use persistent cookies which remain on the hard drive of your personal computer. We use persistent cookies for a number of purposes including to store your preferences for certain kinds of information, to provide you with access to certain websites for which you have previously registered, to retrieve information you have provided us previously, etc. You can set your browser to disable cookies or prevent them, or you can delete cookies which have already been set by instructing your browser accordingly. The persistent cookies used on Citibank, N.A. credit card websites are available only to Citibank, N.A. or to certain agents of Citibank, N.A. who are performing services or hosting specific websites on our behalf.
We may also use transient cookies, which are not stored on your hard drive and are not available to anyone other than Citibank, N.A. Transient cookies contain information that identifies you and allows you to navigate our site from one page to another without requiring you to log in again on each page. When you leave our site, or when your session expires, the transient cookies expire.