What about simply disabling the keyboard electrically, using some sort of access control device (token, fingerprint reader, ...). I think these are available off the shelf. Sure - someone might bring along their own keyboard and awap it in, but I don't think that's the kind of problem you're worried about.
Even Microsoft makes a fingerprint reader for PCs, though I think it uses Windows software rather than anything at the keyboard level. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
