[Tinyos-help] Random Number

[Michael Schippling]

This is beginning to feel like being in the software industry again:
Work to some set of requirements, then they change the requirments...
MS


Chao Sun wrote:
> Michael Schippling wrote:
>> very cool, nice paper.
>> But did you really run the data collector for a month?
>> And nothing crashed?
>> heh
>>
>> MS
>>
>>
>> Aurélien Francillon wrote:
>>  
>>> Michael Schippling a écrit :
>>>
>>> ...
>>>
>>>    
>>>> To get a more "random" sequence you need to use some kind
>>>> of natural input, like an open ADC or maybe the RSSI with no
>>>> active transmission. Even then one can make an argument that
>>>> the data is not Truly Random since everything carries some
>>>> notion of state...
>>>>         
>>> you  may be interested in TinyRNG which is doing similar stuff than 
>>> above + is designed for security (key generation etc.... ) :
>>>
>>> http://planete.inrialpes.fr/~francill/Papers/TinyRNG.pdf
>>>
>>> http://planete.inrialpes.fr/~francill/stuff/TinyRNG-0.1.tar.gz
>>>
>>>
>>> cheers
>>> Aurélien
>>>     
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>>
>>   
> Hi,
> 
> Now the problem is that I need to generate a sequence of random numbers 
> for all the sensor nodes, that is, after initiation and generation of 
> the numbers, every node knows exactly what these numbers are.
> If I call the random number generator in the StdControl.init(), then 
> each node may generate different numbers, and thus they can not achieve 
> a consensus. Thus, do I have to generate these numbers via some outer 
> programs and explicitly declare them in the node initiation? Is their 
> any better methods?
> 
> Thanks,
> Chao

-- 
Platform: WinXP/Cygwin
TinyOS version: 1.x, Boomerang
Programmer: MIB510
Device(s): Mica2, MicaZ, Tmote
Sensor board: homebrew