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Author Topic: New RSA Algorithm discussion  (Read 66835 times)

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Offline willrandship

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Re: New RSA Algorithm discussion
« Reply #120 on: February 27, 2011, 06:13:07 pm »
and how does that work? sounds cool but it also sounds like you'll need a server, and net access on all the pcs running it.

Maybe we could just config the prog to run a specified range, and claim them on here....
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Offline jnesselr

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Re: New RSA Algorithm discussion
« Reply #121 on: February 27, 2011, 06:13:40 pm »
Quote from: willrandship on February 27, 2011, 06:13:07 pm
and how does that work? sounds cool but it also sounds like you'll need a server, and net access on all the pcs running it.

Maybe we could just config the prog to run a specified range, and claim them on here....
Well, that's essentially what the site I was/am going to set up will do.
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SirCmpwn

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Re: New RSA Algorithm discussion
« Reply #122 on: February 27, 2011, 06:13:52 pm »
No, it doesn't need a server, and runs on almost every platform imaginable.  You'll be able to specify your range, and claim it here.
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Offline willrandship

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Re: New RSA Algorithm discussion
« Reply #123 on: February 27, 2011, 06:26:03 pm »
Sweet! if only we could recover all the work we wasted on the perl script :P

@sir does that include z80 asm?
« Last Edit: February 27, 2011, 06:26:28 pm by willrandship »
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SirCmpwn

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Re: New RSA Algorithm discussion
« Reply #124 on: February 27, 2011, 06:27:53 pm »
Every platform that it would be reasonable to run a key factoring program on.
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Offline willrandship

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Re: New RSA Algorithm discussion
« Reply #125 on: February 27, 2011, 06:30:08 pm »
Ok :P
is it java then? or perhaps C?
« Last Edit: February 27, 2011, 06:30:25 pm by willrandship »
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Offline z80man

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Re: New RSA Algorithm discussion
« Reply #126 on: February 27, 2011, 06:30:49 pm »
Quote from: SirCmpwn on February 27, 2011, 06:27:53 pm
Every platform that it would be reasonable to run a key factoring program on.
Maybe z80 isn't reasonable enough, but SH3 could add just that little oomph of speed needed to factor the RSA.

And Java is not fast enough.
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Re: New RSA Algorithm discussion
« Reply #127 on: February 27, 2011, 06:30:58 pm »
It's C#, and under Mono it can run pretty much anywhere.
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Offline alberthrocks

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Re: New RSA Algorithm discussion
« Reply #128 on: February 27, 2011, 06:36:23 pm »
A server is being set up atm, with broooom coding the thing since I don't have time atm to do it. :(
A server is OPTIONAL - the program can surely work fine without it. :) It is just there to store values and such.
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Offline willrandship

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Re: New RSA Algorithm discussion
« Reply #129 on: February 27, 2011, 06:36:32 pm »
eh, bytecode is slow, be it java, C# or python .pyc files. It has it's place, but IMO this is a place for machine code.
« Last Edit: February 27, 2011, 06:36:56 pm by willrandship »
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Offline alberthrocks

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Re: New RSA Algorithm discussion
« Reply #130 on: February 27, 2011, 06:39:14 pm »
I think the current plan is to get a good base working, API and all (client and server communications), then we can start porting it to C/C++. :) I'd definitely like to see wxWidgets come into this (although I hate C++, it does have good stuff in it).

Cross platform is key - the .NET based one won't be discarded - it'll still be used for other devices.
The C/C++ one will be used for mainly PCs and such that can run it.
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Re: New RSA Algorithm discussion
« Reply #131 on: February 27, 2011, 06:40:54 pm »
Quote from: alberthrocks on February 27, 2011, 06:39:14 pm
Cross platform is key - the .NET based one won't be discarded - it'll still be used for other devices.
.NET is more cross-platform than anything else you can think of.  And its the only technology that we could feasibly make such a complex program with.
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Offline alberthrocks

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Re: New RSA Algorithm discussion
« Reply #132 on: February 27, 2011, 06:43:44 pm »
Quote from: SirCmpwn on February 27, 2011, 06:40:54 pm
Quote from: alberthrocks on February 27, 2011, 06:39:14 pm
Cross platform is key - the .NET based one won't be discarded - it'll still be used for other devices.
.NET is more cross-platform than anything else you can think of.  And its the only technology that we could feasibly make such a complex program with.
.NET is not the only technology that you can make complex programs with.... :P
C/C++ has been used (Lionel's program to do this, for instance)...
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Re: New RSA Algorithm discussion
« Reply #133 on: February 27, 2011, 06:44:39 pm »
I'll make one with .NET, and you can choose whether or not to use it.  I hope for the community's sake that people use it if there isn't an alternitave they'd prefer.
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Offline calc84maniac

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Re: New RSA Algorithm discussion
« Reply #134 on: February 27, 2011, 08:23:35 pm »
Here's a checking algorithm that tests based on the difference between the two primes.

Let N=p1*p2 be the number to factor, and let p1=A-B, and p2=A+B for integers A and B. p1 and p2 differ by 2B (a valid assumption for two large prime numbers). Then N=(A-B)(A+B)=A^2-B^2. Thus, N+B^2=A^2.

Here's some pseudocode (N=number to factor, B=initial value of B):
Code: [Select]
x=N+B*B;
dx=2*B+1;
A=floor(sqrt(x));
y=A*A;
dy=2*A+1;
while(x != y)
{
  y += dy;
  dy += 2;
  while(x < y)
  {
    x += dx;
    dx += 2;
  }
}
A = (dy-1)/2;
B = (dx-1)/2;
p1 = A-B;
p2 = A+B;This is simple enough that it might be possible to write an optimized assembly version. That would be awesome :D
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