3 ms·

These cloud based solutions perform hashing+salting+KDFing locally and then add additional compute cost on the cloud level. I don't see any issues with that.

• fuoqi 6y ago
  The issue is that if an attacker can eavesdrop on a compromised authentication server, then it can record user's master-key and thus he will be able to impersonate user without issues until the password gets changed (i.e. the derived master-password is actually plays role of a password now). With PAKE this issue simply does not exist.
  • CyberRage 6y ago
    Nono. the master-key never leaves the device. Via the master-key, the program derives(locally) the key to encrypted the data and a different secondary key for authentication against the server. without knowing the master-key you can't decrypt the vault even if you were able to trick the server into sending you the vault. The vault is decrypted locally
    • fuoqi 6y ago
      Deriving two separate keys does indeed improve the situation, but still not ideal, see: https://news.ycombinator.com/item?id=26230259 https://news.ycombinator.com/item?id=26230259