You are viewing this page in an unauthorized frame window.
This is a potential security issue, you are being redirected to https://csrc.nist.gov.
An official website of the United States government
Here’s how you know
Official websites use .gov A
.gov website belongs to an official government
organization in the United States.
Secure .gov websites use HTTPS A
lock (
) or https:// means you’ve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
The Citadel TM II integrated circuit is a digital encryption device that provides high-grade protection for both voice and data media. Citadel TM II offers a small form factor, low power, high data rate solution for your communication security requirements. Citadel II implements AES 128, 192 and 256 bit key sizes. A customizable version of AES is also available. The device supports CFB-1, CFB-128 and Counter feedback modes. The Citadel II crypto engine is the next generation device in the Citadel family providing assured communications(tm) with its advanced cryptographic features. The highly successful Citadel I device has been fielded worldwide and is the backbone of many national secure radio communication systems.