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I-D ACTION:draft-ietf-stime-ntpauth-03.txt



A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Secure Network Time Protocol Working Group of the IETF.

	Title		: Public-Key Cryptography for the Network Time Protocol 
                          Version 2
	Author(s)	: D. Mills
	Filename	: draft-ietf-stime-ntpauth-03.txt
	Pages		: 38
	Date		: 07-Feb-02
	
This memorandum describes a scheme for authenticating servers to clients 
using the Network Time Protocol. It extends prior schemes based on 
symmetric key cryptography to a new scheme based on public key 
cryptography. The new scheme, called Autokey, is based on the premiss 
that the IPSEC schemes proposed by the IETF cannot be adopted intact, 
since that would preclude stateless servers and severely compromise 
timekeeping accuracy. In addition, the IPSEC model presumes 
authenticated timestamps are always available; however, 
cryptographically verified timestamps require interaction between the 
timekeeping function and authentication function in ways not yet 
considered in the IPSEC model.

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