Browse Prior Art Database

Method and Apparatus for Preventing Trailing Users

IP.com Disclosure Number: IPCOM000104763D
Original Publication Date: 1993-May-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 1 page(s) / 38K

Publishing Venue

IBM

Related People

Johnson, WJ: AUTHOR [+2]

Abstract

One of the most frequent security violations is the entry into a secured area by a trailing user. This occurs when one user enters the secured area by inserting his/her badge into a badge reader, which causes the door to be unlocked for a few seconds. After the user enters, another user opens the door while it is still unlocked, without having to use the badge reader. This is commonly called "tailgating", and there needs to be a way to prevent these security violations.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 70% of the total text.

Method and Apparatus for Preventing Trailing Users

      One of the most frequent security violations is the entry into
a secured area by a trailing user.  This occurs when one user enters
the secured area by inserting his/her badge into a badge reader,
which causes the door to be unlocked for a few seconds.  After the
user enters, another user opens the door while it is still unlocked,
without having to use the badge reader.  This is commonly called
"tailgating", and there needs to be a way to prevent these security
violations.

      This system adds logic to badge readers which enables them to
inhibit the blatant form of tailgating as described above.  In that
example, the security violation is caused by the fact that the badge
reader unlocks the door for a pre-defined number of seconds.  This
system introduces a procedure which will insure that the door is
re-locked after the first user enters, whether or not a certain time
period has elapsed.

      The logic for the badge reader at the entry to the building is
as follows:

Prevent tailgating
   Read badge at entry to building X
   Access this user's profile
   Verify user clearance
   Unlock door
   Monitor for timeout condition (A; = Old Code)
    while also monitoring for the door opening (B; = New Code)

   A;Monitor for timeout condition
       When the predefined time has elapsed
         Do
           Lock door immediately
           Cancel badge re...