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Re: [Cfrg] IBE checking...

Watson Ladd <watsonbladd@gmail.com> Tue, 18 November 2014 05:32 UTC

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Date: Mon, 17 Nov 2014 21:32:04 -0800
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From: Watson Ladd <watsonbladd@gmail.com>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: Re: [Cfrg] IBE checking...
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Someone more familiar with the byte-level formats of RFC 5444 needs to
check that the various ID spaces are nonoverlapping over the space
they need to be. It's the only problem I could see, assuming RFC 6507
is a secure scheme.

Sadly, RFC 6507 has no references to a security analysis or
publication describing the scheme. The security argument isn't
actually a security argument. My attempts at finding such an analysis
have come up dry.

I also found a patent application WO2001043341A2 which seems to cover
this method in claim 4. I can't figure out if it was granted or not:
my guess is no, because I haven't found patents, just applications.

Anyway, this doesn't directly answer the question presented.

Sincerely,
Watson Ladd

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