Facebook is an online social networking service founded in February 2004 by Mark Zuckerberg.

learn more… | top users | synonyms

136
votes
5answers
18k views

Does Facebook store plain-text passwords?

I was about to reset my Facebook password and got this error: Your new password is too similar to your current password. Please try another password. I assumed that Facebook stores only password ...
48
votes
5answers
97k views

Anonymity on Facebook - how do they suggest people I should know?

I want to know how Facebook discovers the people who you know in real life or who know you. I tried the following to see if Facebook can still discover my acquaintances in real life and suggest them ...
-4
votes
1answer
221 views

Facebook friend suggestions [closed]

An ex of mine has joined Facebook yesterday and I have been informed of this and asked to make friend suggestions for him. I have had no contact with him for over 5 years and have deleted his home ...
24
votes
1answer
2k views

Facebook password lowercase and uppercase

Recently I logged into my Facebook account and then noticed that my caps lock was on. So I tried to log in again with and without capslock on. I got in both times. Then I tried to log in with the ...
6
votes
3answers
3k views

Why did Facebook not use HSTS for a long time after it became available?

(Note that Facebook now does use HSTS. The question was asked at a time when they didn't.) To force a browser to always go directly to HTTPS for a website (and not rely on 302 redirects from the HTTP ...
5
votes
6answers
21k views

Is update@em.facebookmail.com legitimate?

I'm having a hard time figuring out whether this email a friend of mine got is legit or a scam. The weird thing is there's only one link to facebook.com, which is the one about facebook terms. All the ...
3
votes
1answer
111 views

How is Facebook accessing my iPhone texts in order to recommend friends?

I have noticed that Facebook has been recently recommending people who have texted me. It has been able to connect their number (I believe most of these people are using iPhone) and connect their ...
3
votes
4answers
611 views

How can I constrain or limit 3rd party Javascript (*.js) files that can DOS my site?

Many website owners integrate Google analytics, various Facebook or Twitter social media javascript plug ins into their web pages. The problem is that this trust seems to be "all or nothing", meaning ...
0
votes
0answers
28 views

Facebook app permissions

According to an answer to this question : Bypass app permissions, I changed by curiosity the application permission of Facebook and Messenger for the camera to always ask. I'm using CyanogenMod 12.0. ...
0
votes
0answers
19 views

How does the Facebook App on iPhone access the SMS data from iMessages? What are the details?

(This is not a repeat question to "How is Facebook accessing my iPhone texts in order to recommend friends?", linked below. I wish to know the internal details of how downloading the Facebook app on a ...