Questions tagged [wifi]

Security for 802.11 wireless networks.

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62
votes
6answers
426k views

If someone hacks my wi-fi password, what can they see and how?

If someone knows my wifi password (be it WEP or WPA) what can they see? Do they just see URLs I visit, or can they see everything in my browser, or even everything I do on my computer? Does using ...
72
votes
7answers
59k views

Is there any security threat with open WiFi connection?

For a few days, my mobile device has been able to catch Wi-Fi signals that are within its radius. It's not asking for a password to use the service. So, I'm using the Wi-Fi service whenever I need to. ...
143
votes
11answers
89k views

Is visiting HTTPS websites on a public hotspot secure?

It's often said that HTTPS SSL/TLS connections are encrypted and said to be secure because the communication between the server and me is encrypted (also provides server authentication) so if someone ...
53
votes
5answers
71k views

Preventing deauthentication attacks

I am helpless against some kiddy with backtrack who repeatedly uses aireplay-ng to deauthenticate legitimate users on my Wifi work network. I captured and analyzed the network traffic on my Wifi work ...
255
votes
5answers
29k views

Consequences of the WPA2 KRACK attack

Today new research was published on vulnerabilities in wireless network security called Krack. What are the real-world consequences of these attacks for users and owners of wireless networks, what ...
69
votes
12answers
114k views

Can I prevent my neighbors, whom I pay for shared internet (WiFi), from seeing the sites I've visited?

I pay my neighbors to use their WiFi. They have listed me as Guest with a separate password from theirs. Is there any way to prevent them from seeing the sites I've visited? My browser history clears ...
41
votes
4answers
15k views

Are WPA2 connections with a shared key secure?

This is something that has been bugging me for quite some time: when I have a wifi access point with WPA2 encryption and I give out the key, how secure are the connections? With WEP you could easily ...
20
votes
3answers
82k views

Four-way Handshake in WPA-Personal (WPA-PSK)

Can someone explain to me in what consists the Four-way Handshake in WPA-Personal (WPA with Pre-Shared Key), which informations are being sent between AP and client, how is it possible to find the AP ...
13
votes
5answers
5k views

What are potential security risks when using an insecure wireless connection?

If someone is using an insecure wireless connection (for example a hot spot in a coffee shop) does it pose a threat even if the person is using a secure application layer protocol? What I mean by ...
37
votes
5answers
8k views

Security impact of using a public password for free WiFi

We have a WiFi network that we want to be public and free. Does having a password that is known to everyone provide any additional security advantage to the people using this network as opposed to ...
22
votes
8answers
45k views

Tracking down a rogue access point

Over the course of about a month we have received multiple reports of a rogue access point attempting to intercept traffic. I suspect an attacker is using a wifi pineapple, or similar hardware device....
19
votes
8answers
277k views

Can an employer see what I'm doing on my iPhone whilst logged onto wifi

I log on to my works wifi throughout the the day whilst at work, I use apps like WhatsApp and iMessages to communicate when I need to, can my employer see the content of those messages (actually read ...
14
votes
3answers
8k views

My school wifi asks to 'trust' a certificate on Iphone's, does it this allow them to view SSL traffic?

There is a lot of confusion around this on here, so I am making this post to be sure to understand it correctly. My school uses Aruba networks wifi, and after I type my Active Directory username and ...
29
votes
7answers
3k views

How to secure a WiFi network?

What do I have to do to secure a WiFi network? Is there any best practices? I have been recommended to use WPA2 encryption on the router, is that enough? What can I do to improve the security even ...
9
votes
2answers
1k views

WPA3 announced. Really needed?

It seems Wi-Fi Alliance announced WPA3 for the end of 2018. Anybody knows exactly what is new? features, security improvements, etc... Is it because of Krack attack? I thought patching WPA2 is enough....
33
votes
6answers
17k views

Are MAC Address Filtering and SSID Hiding still worthwhile?

On a recent certification exam, I was presented with a question about ways to secure an 802.11 wireless network. It was a multiple-answer question, but the only two available answers that related at ...
10
votes
3answers
21k views

How does WEP wireless security work?

I want to know more about how WEP (Wired Equivalent Privacy) protocol for wireless security. From this Wikipedia article I have got a basic Idea. But what is the initialize vector? Is some kind of ...
142
votes
9answers
18k views

To sufficiently protect against KRACK is patching the client, the AP, or both, required?

Following on from this question, I am unclear on which of the following steps are sufficient to protect a WPA2-based wifi connection from the KRACK flaw: Patching the AP (e.g. router) Patching the ...
52
votes
8answers
21k views

Can an open Wi-Fi hotspot be considered “secure” when using a VPN connection?

There are many open Wi-Fi hotspots scattered around from cafes to airports. I understand that a non-passworded Wi-Fi leaves traffic unencrypted and therefore available for hackers to read. I also ...
33
votes
8answers
115k views

Why is WPA Enterprise more secure than WPA2?

In personal mode WPA2 is more secure than WPA. However, I have read that WPA Enterprise provides stronger security than WPA2 and I am unsure exactly how this is achieved.
30
votes
10answers
6k views

How can I ensure that I connect to the right wireless Access Point?

Under Windows/Linux, client side. How can I ensure that I'm not connecting to a rogue AP?
52
votes
5answers
7k views

Is there any way for my ISP or LAN admin to learn my Gmail address as a result of me logging into Gmail's web interface through via their network?

The title says it all, really. I'm Alice, and I want to login to Gmail's web interface through my browser. Ike, the internet service provider, and Adam, the local network administrator, would like to ...
18
votes
4answers
8k views

How to use public WiFi safely?

The Dangers of Open Wi-Fi How does one go about sending valuable information (for example inputting email username and password) over a free password-less public WiFi network? The only option that I ...
13
votes
3answers
8k views

Is it possible to get all the data I send through wifi?

Is it possible, that the network administrator (wpa2 wifi network) can log all the data the users send and then get password out of it? I know it is not possible to get the password if I'm surfing ...
13
votes
4answers
8k views

Can other WIFI users see my network traffic?

Lets say I go to some hotel, the hotel has a WIFI network that requires as password and/or username to access. Can other hotelguests then see my wifi traffic if they are not logged in to the wifi, and ...
3
votes
2answers
3k views

WiFi Hotspot's Evil Twin

So an Evil Twin Wifi hotspot is a hotspot with the same SSID and/or same MAC that when the victim auto-connect to this hotspot, all traffic go through this evil twin and thus the information ...
2
votes
3answers
33k views

Tumblr app on while Android phone logged onto work wifi

I used the Tumblr app on my smartphone to access some adult Tumblr feeds while on my home network. I also used my phone's internet browser to view some adult content. While all this is completely ...
60
votes
8answers
23k views

Why isn't open WiFi encrypted?

As far as I understand, WiFi networks that require no password send traffic through the air unencrypted. Those that require a password encrypt each connection uniquely, even if they're all using the ...
33
votes
3answers
16k views

How safe are Wi-Fi Hotspots? Because WPA 2 is compromised, is there any other security protocol for Wi-Fi?

WPA 2 can be cracked using Aircrack-ng in Kali Linux. Is there any other security protocol for Wi-Fi which is not compromised?
16
votes
6answers
18k views

Is my computer at risk of being hacked when using public Wi-Fi?

I'm sitting at a cafe, using their public Wi-Fi. I don't go on sensitive sites; I basically go to a music site and listen to a live stream, for which there's no login. I don't check my email or visit ...
18
votes
4answers
9k views

Can an attacker sniff Mac addresses on a wifi?

If an attacker turns on wifi but doesn't have the security key to connect to an access point in range, can he still sniff packets that travel between the access point and clients connected to the ...
9
votes
2answers
1k views

Any advantage to securing WiFi with a PSK, other than to keep out unauthorized

As I understand WiFi with a PSK, such as WPA(2)-PSK or WEP, anyone on the same network can decrypt anyone elses packets because everybody has the same key. In which case, if you are not going to ...
7
votes
2answers
1k views

Why do phones send wifi probes?

They could just listen to beacons. Why do they probe for every network you've ever connected to? Do other wireless devices do this? Does Windows, Linux esp. Kali, do this?
4
votes
2answers
1k views

Public AP: How to reduce vulnerability window between Captive Portal and starting VPN?

I always use a VPN on my Mac when I access over public APs (such as coffee shop free WiFi) How much should I worry about the window of time where I am in the captive portal (the agreement screen) and ...
-2
votes
1answer
5k views

Risk of using university Wi-Fi network [duplicate]

I have lost my modem to use the internet and I am starting university next week. There is Wi-Fi available to the students in the university, but I'm worried about the risk of using it. Can other ...
9
votes
0answers
2k views

The Dangers of Open Wi-Fi [duplicate]

I know that the first response to a question titled like so is "seriously?". I know the answers exists, but I am just trying to put everything together. Using and/or having an open Wi-Fi network is ...
2
votes
2answers
13k views

Has the WPS brute-force cracking issue been fixed?

I have heard a rumor that the WPS brute force attack doesn't work on newer devices. Is that true?
118
votes
3answers
18k views

Why wasn't the KRACK exploit discovered sooner? [closed]

From what I've read, the issue is as simple as performing step 3 of a 4-step handshake and the consequences of performing that step more than once. Considering the complexity of these kinds of ...
23
votes
5answers
8k views

Access to a router's GUI

During a recent visit to a coffee shop, I noticed that they hadn't bothered changing their default user name and password for their router. I realise that someone could log on and be annoying to ...
17
votes
2answers
11k views

How to force clients to connect to WiFi automatically?

I have watched a hak5 YouTube that they did make people connect to their wifipineapple (a WiFi Honey pot) , and they stored the Wi-Fi hotspots, those the phone used to connect to. The historical ...
34
votes
3answers
86k views

How risky is connecting to a hidden wireless network?

According to something I spotted something in a set of directions for connecting to a hidden wireless network from windows 8 found here (located under Step 1 > "Troubleshoot connection problems" > "...
24
votes
7answers
66k views

Can a WiFi access point operator tell that I'm streaming video to my phone?

I work at an office typing numbers into a computer. It gets quite boring sometimes, so I go on Netflix while using their WiFi on my phone. Can they tell what apps I'm using, based on network traffic?
21
votes
2answers
40k views

Do VPNs provide sufficient protection over public wireless networks?

I know that VPNs are the standard way to secure communication between a remote user and their primary network, but I've never felt entirely comfortable relying on them when using an open wireless ...
15
votes
3answers
9k views

How does FaceNiff work?

FaceNiff is an Android app that sniffs Facebook session ids. You must be connected to the same WiFi as the victim. It is said to be working even when WPA2 is present. How is it possible? I can decrypt ...
12
votes
3answers
9k views

Is it possible to speed up WPA/WPA2-PSK cracking using a rogue AP?

We know that WPA/WPA2-PSK uses a PTK (Pairwise Transient Key) for each client to encrypt the communication. This PTK is generated through the process known as 4-way handshake. As told in the related ...
14
votes
2answers
4k views

Would an unnecessarily long password degrade performance of a WPA2 wireless network?

My friend wants to keep his home network super-secure, due to some trouble that he's had with unwelcome Wi-Fi intruders. So, naturally, he devised an ultra-long WPA2 passphrase (on the order of 100+ ...
11
votes
2answers
4k views

Does WPA2 Enterprise mitigate evil twin attacks?

One of the dangers of using WPA2-PSK is the possibility that an attacker may setup another wireless network with the same SSID and even use the same access point MAC address via MAC spoofing. The ...
8
votes
1answer
17k views

Why is a CA certificate required for EAP-TLS clients?

When setting up clients with WPA2 EAP-TLS, most clients (ie: my phone, my computer) require both a client public/private keypair (for obvious reasons) and a certificate authority certificate. It's ...
8
votes
1answer
5k views

What makes PINless Wi-Fi Direct using WPS on Android secure?

I've read from Wikipedia that Wi-Fi direct uses WPS (Wifi Protected Setup), and I know that in Android (at least what I have which is 4.0.1 on Galaxy S3) uses the WPS method of the "push button" to ...
3
votes
2answers
8k views

can wpa2 wifi be hacked by capturing data on an evil twin?

If I copied the wifi essid and channel and did a de-authentication to the clients of the wifi that I want to hack and started a wifi of my own with the same essid, bssid and channel and I started ...