#DROPBOX PASSWORD PASSWORD#
The latter scenario can be arranged by having a Hardware Security Module or a special, hardened server (e.g., the Transit backend in Hashicorp's Vault) be the sole owner of the encryption keys, so that the other servers that possess the password database can only ever encrypt or decrypt password entries by sending the ciphertexts over to that specialized key owner to do it for them. The attacker gains access to a host that has all of the password entries, but no such host ever contains the encryption key.An attacker acquires the encrypted password hashes by executing a SQL injection or similar attack against a front-end web application, but the encryption key is not stored in the RDBMs where the entries are.There are some plausible scenarios that meet that description: So it only provides additional security in scenarios where the defender can successfully arrange for that condition to be met. If the attacker acquires both, then it doesn't do anything. The use of an additional encryption step, in particular, protects against scenarios where the attacker manages to acquire the encrypted scrambled passwords but not the encryption key. Are those scenarios likely enough risks that it's worth the additional complexity?.Are there any scenarios that it protects against that just bcrypt doesn't?.Instead of asking "is it more secure" in general terms as you do, we need to actually be specific and ask: Is this really more secure than using bcrypt with a complexity of 11 or 12 ? The password "chain" is secure as its weakest part, so is there any point adding the extra 2 parts in ? Carrying a brute force attack against AES is impossible in practice. If you use AES with a random 128-bit key (the smallest key size), an attacker who obtains the encrypted hashes but not the key is effectively dead on their tracks. I understand that the Global "pepper" means that a DB dump protects the hashes until that pepper is found, and then each hash is still salted per user, but how much would that slow down people reversing the passwords in the event of a DB leak over simply bcrypting them ? So you win in case you can protect the key and you lose nothing if you can't do that. However as soon as you have exfiltrated the key, the additional AES encryption has just about 0 influence on the run-time required for brute-forcing a key. If an attacker doesn't get hands on this one there's no way they can recover the hashes and thus potentially the passwords. The passwords in the event of a DB leak over simply bcrypting them ? Salted per user, but how much would that slow down people reversing The hashes until that pepper is found, and then each hash is still I understand that the Global "pepper" means that a DB dump protects You can't get to the core (the password) without going through all the layers (pepper, bcrypt, SHA-512).
There's no way such an attacker could recover the passwords because he can't obtain the hashes required to brute-force them.Ī better analogy would be an onion. Assume an attacker can brute-force infinitely many bcrypt hashes but can't get the pepper. The password "chain" is secure as its weakest part, so is there anyĪ chain isn't really the correct analogy here. If you assume they can guard their pepper better than their password database then the passwords are irrecoverable from the dump. Obviously if you consider everything on their servers compromised this isn't more secure than using a higher workload for the password hashing scheme (PHS). Get peace of mind with the backing of a trusted leader in secure cloud solutions.Is this really more secure than using bcrypt with a complexity of 11
#DROPBOX PASSWORD ANDROID#
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