[OpenID] Localhost OpenID

James A. Donald jamesd at echeque.com
Fri Dec 15 09:06:50 UTC 2006


Jeremy Smith wrote:
> I think it would really be *bad* for OpenID if it were possible to use
> localhost as your identity.  It's the equivalent of saying "I am me".  It
> provides no useful information and does not provide any identity.

In the scenario, your identity is a hash of your public key.   The hash 
only has to be large enough that a hostile party cannot find a duplicate 
of the hash, for which 80 bits is sufficient.  That is 16 alphanumeric 
characters, case insensitive, or 14 alphanumeric characters, case 
sensitive, or 17 alphabetic characters, case insensitive.

So you would type in @key*local, which would be treated as the name of 
your key resolution scheme, which would then resolve to something like: 
@key*bcdkrxzlsxishvmor, where bcdkrxzlsxishvmor is the hash of the root 
key on your usb drive.








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