<div dir="ltr">Thanks, Tim, I'll take a look. I'd like to do 64,000 PBKDF2/SHA1. <div><br></div><div>Mark, thanks for that! I'll do some reading. Funny/interesting that it's no longer used for rendering.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jul 8, 2013 at 4:07 PM, Tim Prepscius <span dir="ltr"><<a href="mailto:timprepscius@gmail.com" target="_blank">timprepscius@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">how many iterations are you going for?<br>
<br>
if you look at the botan mailing list, I think about 6-8 months ago<br>
someone was talking about code specifically for the apple chip set.<br>
<br>
not sure exactly what became of it.<br>
<br>
-tim<br>
<div><div class="h5"><br>
<br>
On 7/8/13, Mark Murphy <<a href="mailto:mmurphy@commonsware.com">mmurphy@commonsware.com</a>> wrote:<br>
> In theory, Renderscript Compute might be useful for this, though I<br>
> have negligible experience with it:<br>
><br>
> <a href="http://developer.android.com/guide/topics/renderscript/compute.html" target="_blank">http://developer.android.com/guide/topics/renderscript/compute.html</a><br>
><br>
> On Mon, Jul 8, 2013 at 3:06 PM, Hans-Christoph Steiner<br>
> <<a href="mailto:hans@guardianproject.info">hans@guardianproject.info</a>> wrote:<br>
>><br>
>> I haven't heard of a framework to do it, but hopefully one exists.<br>
>> Otherwise<br>
>> it means writing your own CPU detection code and coding in assembly...<br>
>><br>
>> .hc<br>
>><br>
>> On 07/08/2013 02:08 PM, Billy Gray wrote:<br>
>>> Hi all,<br>
>>><br>
>>> I was wondering if anyone here has had some experience with trying to<br>
>>> take<br>
>>> advantage of any hardware acceleration that may (or may not) be<br>
>>> available<br>
>>> on Android devices to speed up things like key derivation? I've been<br>
>>> doing<br>
>>> some searching for any high-level, relevant info as a starting point and<br>
>>> coming up fairly empty. I'd really like to be able to use a high number<br>
>>> of<br>
>>> PBKDF2 iterations in one of our apps, but the iteration count I'm going<br>
>>> for<br>
>>> is just unacceptably high as a login speed for a user on a two year old<br>
>>> Nexus S running 2.3.x (better on 4.1.1, but still not good enough).<br>
>>><br>
>>> Thanks in advance for any tips!<br>
>>> Billy<br>
>>><br>
>>><br>
>>><br>
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