Your funds are not safe neither in "cold storage". Read:
https://www2.informatik.hu-berlin.de/~verbuech/klepto-ecdsa/klepto-ecdsa.pdf
many of you said "cold storage is the best". well. it is not. that explains many hacks in Bitcoin which some of the bitcoiners considered to be very safe.
What's next? Mass withdrawals from Bitcoin. What can you do when you KNOW that your cold storage is exposed to be stolen? You must be stupid to keep your earnings there.
Are you a mind reader or something , haha.
I was just reading the same thing on Coindesk and planning to share it here => http://www.coindesk.com/research-hackers-install-backdoor-bitcoin-cold-storage/
Anyway , to be honest . that's really dosen't make me comfortable , those hackers always find a way to screw things up.
"The attacker only has to watch the blockchain until two [compromised] signatures appear ... the affected signatures are not detectable by anyone other than the attacker."
