I would also be concerned about adding a "new" scheme that easily functions as 
an oracle.

On 2/16/19, 8:01 PM, "Peter Gutmann" <pgut...@cs.auckland.ac.nz> wrote:

    Sankalp Bagaria <sankalp.n...@gmail.com> writes:
    
    >We propose that the server is authenticated using X509 certificate in a TLS
    >1.3 like protocol. The Server sends 32-byte Challenge. Client replies by
    >sending 32-byte Response.
    
    Something very similar to this already exists in the form of CHAP/MSCHAP 
over
    PEAP/EAP-TLS/EAP-TTLS.  It's supported by every Radius server and vast 
numbers
    (probably billions) of clients.  To compete against this huge installed 
base, any
    new proposal would have to be pretty spectacular...
    
    Peter.
    
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