unforum

[Flynn]

Disclaimer - this is how I think it works if you quit the client part way through a unit...

Next time you start it up, it will pick up more or less where it left off, so we shouldn't lose any work units that way. As for what happens if a client disappears completely - over to chimera et al, though it might be a while as I believe he is away at the moment.

[chimera245]

The client checkpoint's its position every 100,000 combinations, or a little under 1% of a work unit. It will pick up from the last checkpoint next time you start up.

At the moment I have the expiry date on assigned units set to one month - though that is adjustable. The expiry utility also has a date parameter, so I can for instance expire all units not processed in 6 weeks, or some other period. I can also expire a single client's units if necessary.

[DarkHuman]

when everything picked back up, i had closed and reopened the 13th file. i take it the program still has my email and username?!?

[monty2]

DarkHuman, as I understand it, yes it does.
I've not spotted where it stores it locally, I think it might just store a client reference number (with your details stored at the central coordinatin point under that reference).

Actually I do wish, in any future client versions, it would show this data on each restart, i'm not 100% sure which email addy I used, I'd hate to miss finding the key.
</infinite improbability drive>

Also, on the progress monitor is shows the number of clients, currently 1566, is this the total number of clients that have been registered?
or the total number that are active (i.e. submitted work within last, say, 3 hours etc)?
- I just don't recall seeing it dip yet! which I'd would expect.

[poozle]

Two questions, 1) Guin did you ever get my PM about the mirror for the files?
2) Does this work behind a proxy server, I'm sure I had it working before I left from uni but it now always says:

[Jakeo]

[Flynn]

[chimera245]

Hi.

I was on holiday up until yesterday - so my replies have been patchy at best.

To deal with a couple of points:

1) No Client personal information is stored on client machine, only the Client ID number and a security reference. If you want to see your client reference number and security reference they are in CLIENT.TXT.

2) Proper working with PROXY servers is in testing at the moment - via extensions to the CONFIG.TXT file. It should be live in 1.0.4. All that being said I think Jakeo has a valid workaround

3) The Active Clients are those registered who have unexpired work units. As I think I mentionned in my last post I expired some units towards the rest of last week which 'expired' some clients. Though of course if they start up again they appear back in the active list.

[chimera245]

My ISP's upstream provider is having problems with it's international links at the moment (this being Telstra - I assume one of the tin cans has come off it's bit of string).

So - there is no 13th Labour for the short term - I will advise when it is back.

[chimera245]

ISP is back now - and all seems well once more.

We were down for about an hour.

[corrina]

Presumably this will pick up from where it left off. My computers at home are running the programme but I haven't checked them before work this morning. Will I have to start it up again?

[SocialElite]

http://digg.com/programming/Perplexcity_Players_Need_Your_CPU_to_crack_RC5_Enigma_Card_

In case you haven't heard of it, digg.com is a slashdot-like website with a slightly more grassroots content management system. We could use a bump (or a "digg" as its known over there) to help promote the 13th labour. It might require a quick (and FREE) registration. so please, jump over there, register if necessary and "digg" the above link.

note, just so this doesn't count *completely* as spamming digg.com, I'd also recommend the site as a whole, its usually got interesting things on there.

(and I know this was mentioned previously, but who really reads all 24 pages of this thread?)

[Guin]

nice one

[poozle]

[Skizz]

Hi All.

I've just finished writing a small program to help with this attack on the 13th Labour card. It's a highly optimised version of the client - I have two PCs, on my 1.9GHz one it does a work unit in around 50 seconds and on my 3GHz dual core one it does a work unit in under 20 seconds (that's 0.75 million keys a second)!

Now, I'm no expert at RC5 code and this is all based on decriptions of the algorithm that can be found on the net. Therefore, it needs some peer review before becoming a proper client application. As such, I've included all the source code for the program. It was built using MS Visual Studio 2003 and the solution/project files are included. It doesn't use .NET (the decrypting code is all hand coded assembler) and it doesn't do any server communication but it should be straighforward to add.

The program is PC only and requires a processor with SSE2 capabilities. It assigns a work unit to each processor in the system that the OS reports. The code runs at the idle priority so you shouldn't see any real performance loss in day to day work (although your CPU will be running at 95% or more). Obviously the more foreground work you do will slow down the decryption (remember to turn off your screen savers!).

Feel free to ask questions.

Skizz

P.S. If this becomes a valid client it might get the first pass at cracking the code to about a month and a half.