136
votes
Accepted
Tell browser my site has no scripts
A good option is to harden your Content Security Policy. It allows you to fine-tune which resources the browser will load/run, and is supported by most browsers.
Consider the following header:
...
- 1,855
113
votes
How would a resourceful government block Tor?
Tor is used to circumvent censorship!
No, not directly. Tor is about anonymity, not about availability. Tor alone does not help its users access blocked content. Tor helps by making it hard to link ...
109
votes
Accepted
How would a resourceful government block Tor?
In order to block Tor, all that has to be done is have the current list of Tor nodes which can be found at the following link:
http://torstatus.blutmagie.de/ip_list_all.php/Tor_ip_list_ALL.csv
and ...
- 14.1k
82
votes
Accepted
How to detect if employees are using Tor?
You can use a list of Tor (uplink) nodes, add this to the outgoing firewall, setup a task to update this once a day and you'll be good. But Tor can also be used over a HTTP(S) proxy, so you will have ...
- 3,358
66
votes
Can anti-virus/virus protection be used to spy on you?
Any software you install on your system can compromise the system and thus affect security and privacy. This can be done either willingly or because of bugs in the software. And this is doubly true ...
- 191k
53
votes
How to detect if employees are using Tor?
I believe your major concern should be that:
using anonymous proxy in the network
Is a bad assumption. I would straight away ask:
In which network?
Yorick already touched this point but I'll be ...
- 5,767
47
votes
Accepted
Why hasn't anyone taken over Tor yet?
They might do it already, there is a known technique to dedicate malicious and powerful nodes to the network to be able to take control of some of the traffic.
Tor does not advertise itself to be able ...
- 3,377
44
votes
How can you be tracked using screen resolution/monitor size in Tor?
Perhaps it's worth mentioning that the impact of resizing your browser on your privacy heavily depends on what window size you set. Maximizing Tor browser on a screen with a standard resolution like ...
- 10.1k
42
votes
Accepted
How did the FBI compromise Tor users?
The article you link says that the FBI obtained "the MAC address" for the user computers. MAC addresses are specific to each ethernet hardware, and they don't travel beyond the first hop -- meaning ...
- 323k
38
votes
How would a resourceful government block Tor?
Tor will be actually quite hard to block because of tor bridges:
Bridge relays (or "bridges" for short) are Tor relays that aren't listed in the main Tor directory. Since there is no complete ...
- 10.1k
38
votes
Accepted
Why is Home --> VPN --> Tor worse than Home --> Tor?
Preface: I consider this question to be a false dichotomy and an inversion of the burden of proof. One of the core tenets of building secure systems is that you minimise the attack surface, and resist ...
- 134k
29
votes
How did the FBI compromise Tor users?
The article you posted states how they did it. But the author doesn't seem to be knowledgeable on the subject and it got lost in the article. They didn't crack Tor and more so found a way to collect ...
- 3,352
23
votes
Is it safe to access HTTP sites from Tor?
No, it is not safe. But the reasoning your read is wrong.
When you use Tor, the connection between you and the Tor network is encrypted, so your ISP can not eavesdrop. But when you access a normal ...
- 49k
21
votes
Accepted
What is this potential identity leak that NoScript warns about?
So after some digging into NoScript's settings, I found some settings for something called "Cross-tab identity leak protection". Googling this led to a tor project issue Targeted ...
- 11.4k
17
votes
Stop large requests to my server (TOR)
You could drop packets from tor nodes all together if you like with ip tables.
List of tor nodes can be found at:
Ref 1: https://check.torproject.org/cgi-bin/TorBulkExitList.py
Ref 2: https://www....
- 807
16
votes
Accepted
Does Tor help us to prevent ISP tracking?
You cannot hide how much data you are sending and when you are online. But, Tor encrypts data and sends it through proxies before it reaches the target server, so that hides the contents of the ...
- 32.4k
15
votes
Accepted
Is there any difference between visiting Facebook via their Tor address, and visiting them via their normal address over Tor?
Here is what using Tor to access an ordinary, non-onion facebook URL looks like:
You -> Tor... -> facebook.com
Now both of those links (from you to Tor and from Tor to facebook.com) happen on ...
- 166
14
votes
Can someone use WiFi snooping to see data I send through Tor Browser when I'm not using SSL?
When you use Tor, all data is encrypted between your computer and the exit node. As long as the exit node isn't on the same network that you are on (very, very unlikely to occur), the data will be ...
- 14.7k
14
votes
Accepted
Why is the data from a Tor exit node not encrypted?
Encryption of traffic exiting Tor and going to the destination server is based on whether the destination server supports encryption, and whether the destination server was addressed on an encrypted ...
- 72.4k
13
votes
How can you be tracked using screen resolution/monitor size in Tor?
Client-side code (JavaScript) on a web site you visit has access to screen resolution and other settings. Often the combination of these settings are unique enough to match your current session (...
- 6,844
13
votes
Is it safe to access HTTP sites from Tor?
It depends. Specifically, it depends on the type of data you are accessing and your threat model.
What protection does HTTPS provide with Tor?
Here is a breakdown of some potential adversaries at ...
- 1,581
13
votes
How to detect if employees are using Tor?
The only way you can be relatively sure Tor is not in use on the network is to inspect every device on the network and ensure that Tor is not installed or running on any of them. This could require so ...
- 3,877
13
votes
Is it dangerous to use Tor?
It is difficult to say what nationstate intelligence agencies will do with people who use tor, since they don't generally reveal their procedures. However, there are approximately 2 million connected ...
- 9,402
12
votes
Is there any difference between visiting Facebook via their Tor address, and visiting them via their normal address over Tor?
Visiting the .onion address never leaves the Tor network. Going to facebook.com over Tor exits the network and goes over the clear-net. That clear-net hop allows for an active attacker to get into ...
- 777
12
votes
Accepted
How does Tor guarantee anonymity of Tor network?
It doesn't guarantee anonymity if enough of the network is controlled by a single adversary. There's no general way you can do so; if your whole connection goes entirely through adversary-run ...
- 7,263
11
votes
Why is Tor over HTTPS insecure?
Tor provides anonymity which HTTPS does not provide. HTTPS only provides end-to-end encryption, but a man in the middle can still see where you are connecting to and might find out more (i.e. which ...
- 191k
11
votes
Accepted
How well Tor protects against fingerprinting?
When you do not change anything, the Tor browser is already configured in a way that the fingerprint is identical to every other Tor browser (and is close to the most common fingerprint on the web). I ...
- 2,553
Only top scored, non community-wiki answers of a minimum length are eligible