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[Discuss-gnuradio] gr-nacl: OOT module for data encryption using NaCl

From: Stefan Wunsch
Subject: [Discuss-gnuradio] gr-nacl: OOT module for data encryption using NaCl
Date: Sat, 18 Apr 2015 17:28:37 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0


I want to present you a OOT module which provides the functionality of
the NaCl crypto library for GNU Radio. The NaCl library is a well known
library written by Daniel J. Bernstein, Tanja Lange and Peter Schwabe
[0]. Because the library is not maintained by themselves, I have chosen
the well maintained fork libsodium [1]. This fork is also used by the
crypto messenger tox (awesome project! -> [2]). NaCl is also used by the
messenger Threema (smartphone app).

The features of the OOT module are: Public-key en-/decryption,
secret-key en-/decryption and key-pair (public/secret) or key (only
secret) generation. The system is based on the message API. Furthermore,
I have implemented a byte stream en-/decryption using stream ciphers.
This one uses tagged streams for processing.

If you are interested, you can check out the repo on GitHub [3]. In the
folder examples/ are flowgraphs which explain the functionality. As
well, there are unit-tests ;) So far everything works fine.

I have no idea whether this is already done and I am not a crypto
expert, but here it is!


[0] http://nacl.cr.yp.to/
[1] http://doc.libsodium.org/, https://github.com/jedisct1/libsodium
[2] https://github.com/irungentoo/toxcore
[3] https://github.com/stwunsch/gr-nacl

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