@techreport{stenn-ntp-last-extension-00,
	number =	{draft-stenn-ntp-last-extension-00},
	type =		{Internet-Draft},
	institution =	{Internet Engineering Task Force},
	publisher =	{Internet Engineering Task Force},
	note =		{Work in Progress},
	url =		{https://datatracker.ietf.org/doc/html/draft-stenn-ntp-last-extension-00},
        author =	{Harlan Stenn},
	title =		{{Network Time Protocol Last Extension Field}},
	pagetotal =	4,
	year =		2016,
	month =		mar,
	day =		14,
	abstract =	{NTPv4 is defined by RFC 5905 {[}RFC5905{]}, and it and earlier versions of the NTP Protocol have supported symmetric private key MAC authentication. MACs pre-date the Extension Fields introduced in RFC 5905 {[}RFC5905{]}, and as the number of Extension Fields grows there is an increasing chance of ambiguity when deciding if the "next" set of data is an Extension Field or a MAC. This proposal defines a new Extension Field which is used to signifiy that it is the last Extension Field in the packet. If present, any subsequent data SHOULD be considered to be a legacy MAC.},
}