Linda talks to Dr. Neil F. Johnson, associate director of the Center for Secure Information Systems at George Mason University. Dr. Johnson devised a program which hides messages in computer images and music.



Please keep your community civil. All comments must follow the Community rules and terms of use, and will be moderated prior to posting. NPR reserves the right to use the comments we receive, in whole or in part, and to use the commenter's name and location, in any medium. See also the Terms of Use, Privacy Policy and Community FAQ.