Bitcoin Wallet Maker Ledger Raises $75 Million for Security Push

Bitcoin is the largest cryptocurrency, and with its growing importance there's been a wave of dedicated hedge funds and established players planning on setting up trading desks for digital currencies. Still, some security issues need to be sorted out, and volatility is a concern — bitcoin tumbled below …
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Bitcoin price rise could lead to smart home attacks that cause electricity bills to rise, cyber security …

People's homes could come under attack as a consequence of bitcoin's price surge, a cyber security expert has warned. “Cryptojacking” incidents, in which people's devices are quietly hijacked and forced to mine digital currencies for other people, are on the rise. However, it's not just regular computers …
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Texas security regulators clamp down on Bitcoin mining scheme

The Texas State Securities Board issued a cease and desist order this week against the overseas company for selling investment contracts to mine Bitcoin, referring to the significant computer power and energy consumption it takes to track Bitcoin trading activity. The agency said that USI-Tech and two …
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B2X reverts replay protection due to security issue for lightning and other smart contracts

Yesterday Jeff Garzik merged a commit to the BTC1 repo (aka bitcoin2x) which reverts the opt in replay protection they were planning to use.

https://github.com/btc1/bitcoin/commit/98c0af58c29efbecba25818adb5531fa8c3d0506

The stated reason for this revert was that Peter Todd and David Harding had found that the replay protection could be used to break lightning and other similar smart contracts by using the blacklist address employed in the replay protection to make an un-spendable payment in the smart contract.

This leaves bitcoin2x with no replay protection as of now, and only 1 month until the planned fork date. Although it is not guaranteed, I would think this would cause exchanges to reconsider their support since they no longer have a surefire method of splitting coins, and therefore could be open to replay attacks costing them millions.

submitted by /u/andrewbuck40
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Bitcoin