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Questions tagged [security]

This tag should be used for questions regarding security issues with the design or implementation of Bitcoin and related cryptocurrencies.

1
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1answer
745 views

Fraud Detection & Prevention

What are controls that are in place to detect and/or prevent fraud within the bitcoin system? Are there any know exploits, or potential threats to the system?
25
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8answers
3k views

How can a single person operation keep a collection of online wallets secure?

While this question is similar to others about securing wallets, I think it merits a question of it's own. One thing that has dissuaded me in the past from running an online wallet service of some ...
5
votes
2answers
401 views

What incentive is there for a miner to not include a bad transaction?

'A' has got 1BTC legitimately. He sends out a transaction to transfer that one bitcoin to 'B' with a 1BTC transaction fee added on. (i.e. a bad request.) 'C' is a miner who cares nothing for ...
9
votes
2answers
444 views

What prevents bitcoin from breaking down in case of a “transaction attack”

Let's say that I want to kill Bitcoin by means of a transaction attack. What in the bitcoin system prevents the following approach: I buy a limited number of bitcoin in the market. Using a small ...
6
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1answer
353 views

What is meant by “releasing code tells the hackers what to attack”?

I came across this statement from a SolidCoin developer: Can anyone explain this statement? [06:48] gavinandresen: I came here to ask RealSolid to be responsible and report problems or ...
13
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2answers
345 views

What are the minimum security expectations of an online wallet service?

If you wanted to assess the security of an online wallet service such as a bitcoin bank or ewallet, what would expect to see addressed? Obviously SSL connections, but what about authentication, ...
16
votes
5answers
2k views

Is Bitcoin future-proof?

As I understand things, the security and integrity of Bitcoin rely on the assumption that its hashing is "hard" in some sense. However, in the past, processing power has increased exponentially. ...
9
votes
2answers
237 views

Do any of the Bitcoin exchanges implement trading curbs?

After the big hack of Mt Gox we all became aware that there is nothing in place to prevent "flash crashes." Most stock, FOREX and other exchanges have features like trading curbs or other market ...
6
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2answers
258 views

Is the authentication system of the Bitcoin <-> SMS service PHONECO.IN adequate?

@osmosis made me aware of PHONECO.IN, which makes it possible to send Bitcoins via SMS. My question is whether their authentication system is adequate. From their website: PhoneCo.in is designed to ...