Stackoverflow authentication data storage
15879
How does SO's new auto-login feature work?
90655
How do I save PHP session data to a database instead of in the file system?
103107
Distributed authentication system (different domains, separatate databases)
53651
How to avoid storing passwords in the clear for tomcat's server.xml Resource definition of a DataSource?
100757
Secure shared memory
145994
Can I use a HMAC for Replay Attack protection?
148664
sharing authentication within two drupal distributions
108356
Use of Custom Object to authenticate Users
152133
Password hashing, salt and storage of hashed values
115608
Why not have one login to all stack subdomains?
58025
Authentication filter and servlet for login
93083
Automatic post-registration user authentication
55093
How can I add a Stack Exchange login to my preexisting account?
137734
Why doesn't Stack Overflow require registration?
16903
Securely Storing Oauth Credentials for Apex Callouts
1729
Handling passwords used for auth in source code
140345
Checking integrity of my server data