Linked Questions

6
votes
4answers
1k views

Why change password? [duplicate]

Why are there recommendations to change passwords with certain intervals? If I have a good password, e.g. a long wrongspelled odd sentence with a couple of special characters thrown in, why is the ...
2
votes
1answer
10k views

Best way to encrypt data using php - I am not sure if I doing it correctly [duplicate]

I want to encrypt some data within my php file when I add the stuff to my mysql database. This is how I do it. I create a static key like: $key = md5("pass"); Then I have two functions called ...
0
votes
1answer
2k views

What's the idea behind requiring users to change password periodically? [duplicate]

Possible Duplicate: How does changing your password every 90 days increase security? Some sites require users to change their password every x days. For example, at least 3 online banking system ...
9
votes
0answers
350 views

What do studies show are best practices for password expiration policies? [duplicate]

Possible Duplicate: How does changing your password every 90 days increase security? What are best practices for password expiration policies? There are some questions that already address this ...
0
votes
2answers
150 views

Is there any real security benefit to forced password change intervals? [duplicate]

This question is quite basic, but it bugs me and I'm sure it bugs a lot of other people as well. What is the real security benefit to forcing users to change their password say every 60 days or every ...
0
votes
1answer
146 views

Requiring regular password change counterproductive [duplicate]

According to http://www.csoonline.com/article/3195181/data-protection/vendors-approve-of-nist-password-draft.html "There have been multiple studies that have shown requiring frequent password ...
1
vote
0answers
91 views

password aging, advantages and disadvantages [duplicate]

What is the advantages and disadvantages of password aging? Should we apply password aging policies? Thanks a lot.
1221
votes
23answers
255k views

XKCD #936: Short complex password, or long dictionary passphrase?

How accurate is this XKCD comic from August 10, 2011? I've always been an advocate of long rather than complex passwords, but most security people (at least the ones that I've talked to) are against ...
862
votes
13answers
259k views

How to securely hash passwords?

If I hash passwords before storing them in my database, is that sufficient to prevent them being recovered by anyone? I should point out that this relates only to retrieval directly from the database,...
36
votes
12answers
10k views

Is it acceptable practice to only increment a number when changing a password?

Note: I'm not asking about this password scheme is the best or not (of course it isn't); I'm asking about its theoretical or practical secureness relative to the optimal password scheme based on the ...
26
votes
6answers
7k views

Are passwords that are manually typed in really unrecoverable from memory or disk?

As part of an increase in the security measures for our company, we're moving to making sure all password logins (databases, servers, etc), are done through a password prompt and never using stored ...
33
votes
8answers
6k views

If password expiration is applied, should door-lock expiration be applied too?

After reading some topics on here about password expiration, and also after reading this comment, a question arose in my mind: if we apply password expiration for the safety of users, should our door ...
27
votes
10answers
5k views

How to strike a balance between security policies and practical implementation challenges? [duplicate]

At our organization, we came across some frequent incidents such as: Reported successful password guessing attacks Frequent password reset complaints We started an investigation to identify the ...
25
votes
5answers
9k views

Why is “something you know” the weakest factor of authentication?

Quoting from CompTIA Security+ guide The first factor of authentication (something you know, such as password or PIN) is the weakest factor. Why? it makes sense when we say that humans/users are ...
21
votes
4answers
8k views

Why use a Smartcard for (Two Factor) Auth instead of another medium?

I recently installed Bitlocker on my Windows 8.1 machine, using only a password. I was thinking of getting something other than just a password for my storage drive, something physical, like a USB, SD ...

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