[prev in list] [next in list] [prev in thread] [next in thread] 

List:       bouncycastle-crypto-dev
Subject:    [dev-crypto] Re: Contribution of Grain v1
From:       "=?ISO-8859-1?Q?Torbj=F6rn_Svensson?=" <tobbe79 () gmail ! com>
Date:       2008-11-19 8:55:18
Message-ID: d91c3b1d0811190055n3bd0772ja4ceeff7997e4d30 () mail ! gmail ! com
[Download RAW message or body]

[Attachment #2 (multipart/alternative)]


Hi again,

I'm sorry to say, but there was a bug in the previous attached code. But
good news is that I fixed it. It occurred when the cipher was reset.
We have also implemented Grain-128, which compared to Grain v1 uses a 128
bit key and a 96 bit initial vector instead of 80 bits and 64 bits
respectively. Grain-128 is about twice as fast as Grain v1.

Sincerely,
Torbj=F6rn Svensson (tobbe79@gmail.com)
Emir Bucalovic (emir.bucalovic@gmail.com)


2008/11/14 Torbj=F6rn Svensson <tobbe79@gmail.com>

> Hi all,
>
> I tried to email, feedback-crypto@bouncycastle.org, a few days ago, about
> contributing to the legion of bouncy castle, but I haven't got an answer
> yet. So I thought I would try this mailing list instead.
>
> We are two students at Lund University(http://www.lth.se/english) doing
> our master thesis.
> As a part of our thesis, we have implemented a stream cipher called Grain
> v1. We now would like to contribute our code to you.
> Information about the stream cipher can be found at:
> http://www.it.lth.se/grain/
> The implementation is optimized, and calculates 16 bits simultaneously(ea=
ch
> round). Performance is good and probably on par
>  with the Salsa20 implementation(hard to compare since Salsa uses 32 bits=
).
> The output keystream should be interpreted as little endian, i.e. first
> output bit is least significant bit in the first output byte. Any feedbac=
k
> is of course appreciated.
>
> Sincerely,
> Torbj=F6rn Svensson ( <dt06ts4@student.lth.se>tobbe79@gmail.com)
> Emir Bucalovic (emir.bucalovic@gmail.com)
>
>
>

[Attachment #5 (text/html)]

Hi again,<br><br>I&#39;m sorry to say, but there was a bug in the previous attached \
code. But good news is that I fixed it. It occurred when the cipher was reset.<br>We \
have also implemented Grain-128, which compared to Grain v1 uses a 128 bit key and a \
96 bit initial vector instead of 80 bits and 64 bits respectively. Grain-128 is about \
twice as fast as Grain v1.<br>

<br>Sincerely,<br><font color="#888888">Torbjörn Svensson (<a \
href="mailto:tobbe79@gmail.com" target="_blank">tobbe79@gmail.com</a>)<br> Emir \
Bucalovic (<a href="mailto:emir.bucalovic@gmail.com" \
target="_blank">emir.bucalovic@gmail.com</a>)</font><br><br><br><div \
class="gmail_quote">2008/11/14 Torbjörn Svensson <span dir="ltr">&lt;<a \
href="mailto:tobbe79@gmail.com" target="_blank">tobbe79@gmail.com</a>&gt;</span><br>

<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); \
margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="gmail_quote">Hi \
all,<br><br>I tried to email, <a href="mailto:feedback-crypto@bouncycastle.org" \
target="_blank">feedback-crypto@bouncycastle.org</a>, a few days ago, about \
contributing to the legion of bouncy castle, but I haven&#39;t got an answer yet. So \
I thought I would try this mailing list instead.<div>

<br>
<br>We are two students at Lund University(<a href="http://www.lth.se/english" \
target="_blank">http://www.lth.se/english</a>) doing our master thesis.<br>As a part \
of our thesis, we have implemented a stream cipher called Grain v1. We now would like \
to contribute our code to you.<br>



Information about the stream cipher can be found at: <a \
href="http://www.it.lth.se/grain/" \
target="_blank">http://www.it.lth.se/grain/</a><br>The implementation is optimized, \
and calculates 16 bits simultaneously(each round). Performance is good and probably \
on par<br>

</div>

with the Salsa20 implementation(hard to compare since Salsa uses 32 bits). The output \
keystream should be interpreted as little endian, i.e. first output bit is least \
significant bit in the first output byte. Any feedback is of course appreciated.<br>


<br>Sincerely,<br><font color="#888888">Torbjörn Svensson (<a \
href="mailto:dt06ts4@student.lth.se" target="_blank"></a><a \
href="mailto:tobbe79@gmail.com" target="_blank">tobbe79@gmail.com</a>)<br> Emir \
Bucalovic (<a href="mailto:emir.bucalovic@gmail.com" \
target="_blank">emir.bucalovic@gmail.com</a>)<br><br> </font></div><br>
</blockquote></div><br>


["Grain128Engine.java" (application/octet-stream)]
["Grain128Test.java" (application/octet-stream)]
["Grainv1Engine.java" (application/octet-stream)]
["Grainv1Test.java" (application/octet-stream)]

[prev in list] [next in list] [prev in thread] [next in thread]