History of multi-factor authentication
<p>This may look a bit strange, but I could not find any reference online regarding the first in history multi-factor authentication.
I know FFIEC has <a href="http://www.ffiec.gov/press/pr101205.htm" rel="nofollow">published</a> a requirement for ebanking systems in 2005, but with could not find what systems existed at that time or  before that.
<a href="https://www.ietf.org/rfc/rfc4226.txt" rel="nofollow">RFC</a> for HOTP (which is now a de-facto standard for 2FA) is dated 2005.
As of right now, the oldest two-factor system I can find is <a href="http://motp.sourceforge.net/" rel="nofollow">mOTP</a>, its news section has dates in 2003. </p>

<p>Does anyone has more reliable info on this? 
Thanks in advance</p>