Hackers are everywhere man. ive lost a lot of coins from exchange sites that have been hacked. There must be a solution to this type of behaviour. BTC will not grow if there isnt any trust or 100% security is implemented on sites that are holding bitcoins. I know its not easy as i say but more should be invested in keeping the currency safe and have measures to prevent hackers.
There is no easy solution. 'Security' is never going to be 100% on a web server. Doesn't matter if you spend $100k/year on a security team, it won't matter. Eventually, you WILL get hacked.
I own sites like
https://BitPlastic.com and
https://BitLaunder.com and
https://CoinChimp.com .. we used to get hacked all the time, and I had to pay clients who lost money out of my own pocket to avoid getting branded a 'scam'. We hired a security specialist and we haven't been hacked since, but eventually it WILL happen again. Of that I am 100% sure.
The main consideration for a Bitcoin site owner is simply not store much Bitcoin in 'live wallets' running bitcoind on a server. If you store your client funds in a 'hot wallet' on the server, you are basically begging to get hacked into oblivion, like Flexcoin and MtGox (although that might have been Karpeles theft).
The other thing you need to worry about is fake deposit addresses. For example, hackers will insert their own deposit address into your mysql table, so when clients send funds to the wallet on the server, actually they are sending funds to the hackers. This type of thing is usually discovered within a few hours and losses are kept to a minimum.
I think every Bitcoin website owner needs to maintain an 'insurance' fund of maybe 25% of their profits to simply cover hacking losses.
Some sort of 'Bitcoin insurance policy' might even be a good business idea!
As far as longterm hacking prevention in the Bitcoin world, I don't see that ever happening. At least not with the current Bitcoin protocol
Dr. Michael Moriarty
https://BitPlastic.com /
https://BitLaunder.com /
https://BitArmored.com /
https://CoinChimp.com /
https://BitSpeculate.com