Re: [OpenCoin-devel] Fwd: [GSoC-2015] OpenCoin Digital Cash App

[Nils T. <ni...@op...>]

Re-reading http://sourceforge.net/p/opencoin/mailman/message/31090382/
it looks like the issue was not lack of BigInt support (that was an
issue with WebCrypto, not ASM), but crypto-grade randomness.

That was almost 2 years ago. Has that improved? Or is there some other
source for quality randomness in modern browsers?

/n


On 01.04.2015 14:31, Nils Toedtmann wrote:
> On 01.04.2015 14:28, Nils Toedtmann wrote:
>> Hi Tom!
>>
>> I vaguely remember - but i might be wrong - that there is an important
>> crypto primitive missing, and that is blinding/unblinding. And
>> unfortunatly the API is only exposing crypto primitives, but not the
>> underlying BigInt library, so you have to do it outside JS - which is
>                                                  ^^^^^^^^^^^^^
> Typo. I meant outside ASM
> 
>> pretty slow.
>>
>> I think i even had conversations with the webcrypto gang about this.
>> Will try to find it when i have more time.
>>
>> /n
>>
>>
>> On 01.04.2015 13:15, Tom Salfield wrote:
>>> Hi Stefan,
>>>
>>> On 15/03/15 21:41, Stefan Xenon wrote:
>>>> A while ago we did some tests and found that native JS may be
>>>> problematic because it is very slow for some of our crypto operations.
>>>> We concluded that a native "module" would be a good choice when using
>>>> Phonegap. This module would be native platform code (e.g. Java for
>>>> Android) and perform the crypto calculation. Do you have experience in
>>>> using such?
>>> Out of interest what were the performance problems in doing this using
>>> browser crypto? I'd have thought that with faster browsers, and built in
>>> random number generation this should perform quite well by now. In
>>> firefox and chrome and probably IE12 there is asm.js support - making
>>> implementations potentially significantly faster:
>>>
>>> https://github.com/vibornoff/asmcrypto.js/tree/master/src
>>>
>>> Anyway, just interested to know where the bottleneck would be?
>>>
>>> Thanks,
>>>
>>> Tom
>>>
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>