Linked Questions

535
votes
11answers
87k views

Is my developer's home-brew password security right or wrong, and why?

A developer, let's call him 'Dave', insists on using home-brew scripts for password security. See Dave's proposal below. His team spent months adopting an industry standard protocol using Bcrypt. ...
41
votes
8answers
17k views

Is salting a hash really as secure as common knowledge implies?

(I did search on this topic, but I found no complete question/answer that addressed it, or even good portions of questions that might be relevant.) I'm implementing a salt function for user passwords ...
50
votes
4answers
21k views

Why is using salt more secure?

Storing the hash of users' passwords, e.g. in a database, is insecure since human passwords are vulnerable to dictionary attacks. Everyone suggests that this is mitigated via the use of salts, but the ...
44
votes
2answers
9k views

Are there more modern password hashing methods than bcrypt and scrypt?

This question made me start thinking about password hashing again. I currently use bcrypt (specifically py-bcrypt). I've heard a lot about PBKDF2, and scrypt. What I'm wondering is if there are any "...
31
votes
3answers
13k views

Google Account: implications of using application-specific passwords

In the wake of the recent Mat Honan story I decided to try out two-factor authentication on my Google account. But in order to keep using it with Exchange, the Android OS, Google Talk and Google ...
9
votes
2answers
9k views

How expensive is it to guess a 15 character password, and should I be worried?

I'm currently using AES encryption (at home) on GNU/Linux (one of LUKS AES-256 variants with xts) and on Windows 7 (Truecrypt) with a 15 characters password (alphanumeric lowercase only plus _). ...
14
votes
3answers
2k views

An alternative to traditional passwords: is there some merit to this idea?

If you've got a website aimed at people that are not necessarily technically proficient, letting new users choose their own password isn't very secure because of the simple fact that a lot of people ...
5
votes
1answer
5k views

Why does openssl enc -aes-256-cbc -a -salt increase the file size?

I'm using openssl enc -aes-256-cbc -a -salt for automated differential backups to Amazon Glacier. But I noticed that using this command increases the file size almost perfectly by 35%. In my ...
7
votes
4answers
930 views

multiple dice ware lists to make memorable passphrases?

I understand the basics of why diceware produces good security and why seven word passphrases are a good idea these days. The EFF has helpfully produced updated diceware lists that eliminate lots of ...
3
votes
0answers
531 views

How strong are google's Application-specific passwords? [duplicate]

Possible Duplicate: Google Account: implications of using application-specific passwords In 2-step verification of google accounts, we need to use the Application-specific passwords generated by ...