Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>It <strong>doesn't matter</strong> if your salts are hashed or left as plain strings - the important point is that salting a password prevents the direct use of dictionary/rainbow table attacks to brute-force crack passwords. An added advantage is that each user has a different hashed password as a result.</p> <p>Salts are randomly generated string that are created server-side and don't involve any kind of transmission to or from the browser.</p> <p>On your server:</p> <pre><code> // Password from form $pw = $_GET['password']; // Generate salt using unique values $salt = (rand(8).$registration_date.$username); // Password to be hashed $pwthb = ($pw.$salt); </code></pre> <p>If a hacker gains access to your databases, then your <em>game is over</em> in the majority of cases as you need to store the initial random salt to hash it for comparison.</p> <p>A simple example:</p> <ol> <li>User enters initial password in browser upon registration</li> <li>On your server, password is combined with a unique salt, hashed and stored as password in DB</li> <li>Salt is stored in DB</li> </ol> <p><em>Note: hashing can be done using PHP or using MySQL/DB functions</em></p> <p>When the user returns:</p> <ol> <li>User enters password in browser</li> <li>Grab salt from DB and combine with the password entered</li> <li>Hash password+salt and compare with stored/hashed password</li> <li>If they match: authenticate</li> </ol> <p>In terms of further reading, It's probably worth looking over the following:</p> <ul> <li><a href="https://security.stackexchange.com/questions/16009/is-encrypting-a-salt-value-with-a-password-plaintext-a-viable-alternative-to-str">Is encrypting a salt value with a password/plaintext a viable alternative to straight up hashing?</a><br></li> <li><a href="https://stackoverflow.com/questions/213380/the-necessity-of-hiding-the-salt-for-a-hash">The necessity of hiding the salt for a hash</a></li> <li><a href="https://stackoverflow.com/questions/6141537/how-store-salt-in-distributed-environment">How store salt in distributed environment</a></li> </ul>
    singulars
    1. This table or related slice is empty.
    1. POPHP - Sending password salt for hashing
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USnickhar
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POPHP - Sending password salt for hashing
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COJust a point of note, it isn't 'encrypted', rather it is 'hashed'. Encryption means that it can be decrypted, whereas hashes are 'one-way' and can't be broken back down to the original parts. A small but significant difference when dealing with user passwords. ^^
      singulars
      1. PO
      1. USJon
    2. COAnother small point, if you hash it correctly, the game is not up if access to the DB is gained (use `bcrypt` or stretch the hash significantly so the computational time is at least 1-2 seconds for the creation of the hash stored). The longer it takes to produce the hashed password going in to the DB the longer it will take to try and brute force the actual password from it even if the salt is known.
      singulars
      1. PO
      1. USJon
    3. CO@jon Point noted, just trying to keep it simple.
      singulars
      1. PO
      1. USnickhar
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload