[TLS] Include Speck block cipher?

Efthymios Iosifides <iosifidise@gmail.com> Thu, 17 March 2016 06:35 UTC

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Date: Thu, 17 Mar 2016 08:35:42 +0200
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From: Efthymios Iosifides <iosifidise@gmail.com>
To: joachim@secworks.se, hanno@hboeck.de
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Cc: klimn@di.uoa.gr, tls@ietf.org
Subject: [TLS] Include Speck block cipher?
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Hello all.

I have just found on the ietf archives an email discussion about the
inclusion of the SPECK Cipher
in the tls standards.
It's reference is below :
https://www.ietf.org/mail-archive/web/tls/current/msg13824.html

Even though that this cipher originates from the NSA one cannot find a
whitepaper that describes it's full cryptanalysis. In the above discussion
Mr. Strömbergson somehow perfunctorily presents two whitepapers that
describe the SPECK's cryptanalysis. Although we shall keep in mind that
these papers describe a limited round cryptanalysis. Also we shall not
forget that a similar cryptanalysis has taken place for the famous AES.
Therefore i personally do not see any actual arguments apart from the facts
that concerns the algorithm's  provenance for not including it in a future
tls specification. In conclusion even by this day the SPECK cipher has not
been yet fully cryptanalyzed succesfully.

Thank you!


Yours sincerely,
Efthimios Iosifides