Ouch. Bad news galore On the bright side, we must have quite a bit of volume today on Bter and prices have fallen, so acquisition and mining would hopefully be cheaper. The coins would also hopefully have been bought by people committed to the growth of SLM.

I learnt about the weakness once someone about 4 pages back mentioned about the low scratch space requirements, and the slimcoin.club web miner was experimenting with an iteration limit of 64.

The improvement is actually rather little, around 20% max and you have to tweak for an optimal iteration limit. I haven't checked johnnylatte's hex acceleration routine.

However, once this news gets out (like now) I suspect it would be trivial for experienced GPU coders to accelerate it, if it wasn't already.

POB uses single-SHA256 and not dcrypt, so no iteration-based improvement would help it.

The dump is likely by someone with a GPU miner or a botnet; I've seen single addresses recently hashing with over 5MH.

I'll try to quickly implement the changes into the miner and release it; that should help level the playing field and buy us some time to change the algo, or just go completely GPU friendly.

I'm still for a version of CPU only algorithm though, but we oughta use one that has been well established.