Jonas Schnelli via bitcoin-dev <[email protected]> schrieb am Di., 26. Juli 2016 um 22:10 Uhr:
> Side-note: Bip39 does still use PBKDF2 with 2048 iterations which I > personally consider "not enough" to protect a serious amount of funds. > > But what are the alternatives? Put an expensive processor and a decent amount of memory in every hardware wallet to support scrypt? Use a million iterations and just wait 10 minutes after entering you passphrase? Or compute the secret key on your online computer instead? Also, how many iterations are secure? A million? Then just add two random lower-case letters to the end of your passphrase and you have a better protection with 2048 iterations. If you want to be able to use your passphrase with cheap hardware and be protected against a high-end computer with multiple GPUs that is almost a mllion times faster, then you have to choose a good passphrase. Or just make sure nobody steals your seed; it is not a brainwallet that is only protected by the passphrase after all. Regards, Jochen
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