Live data from Hacker News

Exmo Bitcoin exchange chief executive kidnapped in Kiev

bbc.com

11–20 of 142 posts

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#11
post #9

Earlier quoted context omitted.

Exactly. For large amounts, keep the hardware wallet in a safe deposit box, not in your house.

Or you can use the strengths of cryptocurrency and split a key between a safe deposit box, your home, and yourself, and require 2 of 3 of them to get the original key.

That's a neat idea. Do you mind expanding on it?

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#13
Wow, this is awful. I've met coin exchange directors, and one of them mentioned to me that this was a topic of concern within their management. Specifically that their families might be targeted too. I don't know anything about Mr. Lerner, but hopefully the police will find him safe, soon.

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#14
post #11

Earlier quoted context omitted.

Or you can use the strengths of cryptocurrency and split a key between a safe deposit box, your home, and yourself, and require 2 of 3 of them to get the original key.

That's a neat idea. Do you mind expanding on it?

it's called 2 of 3 multisig and it's a standardized part of most cryotocurrency. it requires X of Y separate key signings to complete a transaction from an address

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#15
post #11

Earlier quoted context omitted.

Or you can use the strengths of cryptocurrency and split a key between a safe deposit box, your home, and yourself, and require 2 of 3 of them to get the original key.

That's a neat idea. Do you mind expanding on it?

Shamir's Secret Sharing allows this even without dealing with multisig wallets.

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#16
post #11

Earlier quoted context omitted.

Or you can use the strengths of cryptocurrency and split a key between a safe deposit box, your home, and yourself, and require 2 of 3 of them to get the original key.

That's a neat idea. Do you mind expanding on it?

You could take a private key and split it into three parts and store them separately.

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#17

Mathematical basis for Bitcoin still compromised by "rubber hose" cryptanalysis. Let this be a reminder that physical security is a necessary precursor to computer security. And I also hope that Exmo's succession plan executor takes the precaution of staying up late tonight to move all their reserves to new wallets.

That will be a brutal task, knowing that doing it ensures your colleague will get tortured and be unable to stop the torture by giving up the bitcoins. Still, probably for the best.

Yeah hopefully assailants will also be educated in the futility of their actions

If the whole idea of a kneecap-breaking plot fails because transferring the funds requires multiple signers then they arent going to break kneecaps

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#18
post #11

Earlier quoted context omitted.

That's a neat idea. Do you mind expanding on it?

Shamir's Secret Sharing allows this even without dealing with multisig wallets.

This is what I had in mind. And it can scale to any "n of m" you want, without any if the downsides if multisig wallets (namely larger transactions, and more complex Bitcoin wallets required)

2 of 2, 3 of 5, 7 of 10, etc...

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#19
It is possible that it was done by a corrupt secret service (SBU), that recently started raiding people involved with crypto currencies in Ukraine and stealing their coins. The ForkLog guy was not afraid to speak up [1]

[1] https://cointelegraph.com/news/ukraine-security-service-alle...

Re: Exmo Bitcoin exchange chief executive kidnapped in Kiev

#20

Mathematical basis for Bitcoin still compromised by "rubber hose" cryptanalysis. Let this be a reminder that physical security is a necessary precursor to computer security. And I also hope that Exmo's succession plan executor takes the precaution of staying up late tonight to move all their reserves to new wallets.

[deleted]
Post reply on HN