Bitcoin brain wallets are useless, like Bitcoiners’ passwords

Hard to guess! Long! Complex! Unique!

Coming up with strong passwords is hard.

That’s certainly the impression you get from things like the annual list of password groaners: “123456,” anyone?

Still hanging on to that No. 1 spot, six years running!

We already know that even rocket scientists can blow it.

But you’d imagine that people tech-literate enough to use Bitcoins might be a bit better at coming up with strong passwords to protect the wallets where Bitcoin addresses and corresponding keys are stored, right?

Not all the time. It turns out that Bitcoiners are also capable of creating easily guessed groaners.

Think Arnold Schwarzenegger, or dudewheresmycar.

But according to new research, the so-called “brain wallets” that some Bitcoiners are using to store their Bitcoin valuables are dangerous, because even passphrases you’d probably think were secure enough can be cracked with a brute-force attack.

Researchers at the International Association for Cryptologic Research (IACR), University College London’s Nicolas Courtois and Guangyan Song, and White Ops’ Ryan Castellucci, took a look at the secp256k1 elliptic curve used by at

Read more ... source: TheBitcoinNews

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