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Questions tagged [whatsapp]

Whatsapp is a proprietary instant messaging client for smartphones

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Why whatsapp only let you create 1 passkey?

Whatsapp is rolling out passkeys. I don't think backing up passkeys in a password manager is a good idea. I'd like to have device bound passkeys but they only allow me to create one. How should I be ...
Gatonito's user avatar
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1 vote
1 answer
2k views

Can malware be contained in an image sent via WhatsApp?

I went online with a new WhatsApp account earlier (with a new number), and the first thing that happened was that I received a threatening message from a number with an ISD commonly used by scammers ...
Southfar's user avatar
1 vote
0 answers
21 views

How do end-to-end encryption (E2EE) IM apps implementing push notifications? [duplicate]

Say WhatsApp and Signal on Android devices, how do they keep the E2EE not be broken? Some answers claimed that WhatsApp uses VoIP background mode on iOS to make the push notification invoke the app to ...
Xiangyi Meng's user avatar
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1 answer
141 views

How WhatsApp knows that account is logged in on 1 device

Recently I was switching devices and my WhatsApp got logged out from 1st device when I logged in to 2nd device. And I got this question on my mind How WhatsApp knows that account is logged in on 1 ...
Xyz's user avatar
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block whatsapp web file transfer but not chating [duplicate]

I work in an organisation where we need to block WhatsApp web file transfers. Meaning chatting will work but downloading and uploading files are blocked. We're using Palo Alto firewalls. I've tried ...
Thomas Shredster's user avatar
1 vote
0 answers
2k views

How to tell if an image has a virus? [duplicate]

I received (and opened) an image from Whatsapp. How can I know if this image contains a virus (spyware)? Is it possible to send photos containing virus using Whatsapp Mod (unofficial versions of ...
Elle.1221's user avatar
1 vote
0 answers
594 views

Get root permission on android for metasploit

Is there any way to get into the root file system in android with an already installed msfvenom apk in reverse_tcp (to get the whatsapp encryption key)
LWX 's user avatar
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5 votes
1 answer
977 views

Free messaging (but not images, video, etc) on United Airlines free wifi: is it secure?

I recently flew with United Airlines and I used their free messaging wi-fi plan. I could text my friends on Whatsapp, but I could not send (nor receive) multimedia content like images, videos or audio ...
kYuZz's user avatar
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2 answers
1k views

Can a VPN hide my IP on Whatsapp?

My IP can be seen by a Whatsapp contact using the netstat command. Can a VPN hide my real IP to them? Or their netstat will still show my real IP?
Datapink's user avatar
5 votes
0 answers
528 views

How does end-to-end encryption work with whatsapp web as of 2022?

The accepted answer to this question is now outdated, since Whatsapp web does not require an online smartphone to function anymore. How is the key exchange performed securely?
Federico Poloni's user avatar
3 votes
1 answer
544 views

Is the new Whatsapp Web update compatible with E2E encryption?

You may see this question as a logical successor of this post. With the new Whatsapp Web update it is now usable without keeping the smartphone online. I can't imagine how this is compatible with End-...
etw0's user avatar
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1 answer
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Decrypting WhatsApp traffic and blocking file uploads possible using a firewall ssl decryption policy?

So we want to block file uploads on WhatsApp but since it's encrypted, I doubt this can be done, however, can PANOS decrypt WhatsApp?? I ask because WhatsApp doesn't exactly use SSL right, it's more ...
wannabemssp's user avatar
0 votes
1 answer
241 views

Is it more secure to receive OTP or send OTP?

I am working on a project that requires users to set up 2-Factor Authentication. As an additional option (apart from the Authenticator app), users can choose their WhatsApp number as an authentication ...
Mathew Paret's user avatar
0 votes
3 answers
7k views

Unknown numbers sending videos on WhatsApp. What should I do?

A number with ISD code +92 sent a video via WhatsApp. No text, only a video. About 20 days later, another number with same ISD sent another video. Should I open the video? OR Should I Report and Block?...
user271562's user avatar
0 votes
1 answer
799 views

What happens when app have access to your photos?

These days I see many apps request access to photos on iPhone. I understand app request access to photos to iOS which then request access to me, that sounds ok. In that context I can allow access to ...
KcFnMi's user avatar
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1k views

Hijacking a WhatsApp session

If a device running a WhatsApp account has already be compromised. Can the attacker steal session cookies/encryption keys on the device and establish a persistent connection to receive calls and ...
Albert Kinterman's user avatar
1 vote
1 answer
754 views

Does my ISP have a clue about what type of activity I'm doing on WhatsApp/Viber/Telegram?

Can my ISP see the difference between sending messages, making video call, and simply engaging with communities - building on traffic types?
Colin's user avatar
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0 answers
199 views

How can I protect myself from this simple, yet lethal (SE) WhatsApp hack?

I've been using WhatsApp as well as my current phone number for at least eight years now. As of now, everything went pretty smooth. That's why the message four days ago, 13rd of August 2021, struck me:...
J. M. Arnold's user avatar
1 vote
1 answer
233 views

Are Whatsapp phone numbers viewable by network admins?

If I connect to a network, is the network admin able to identify user phone numbers used by Whatsapp through the network traffic? In other words, are phone numbers used to signup by messaging apps ...
randomizedmole's user avatar
3 votes
1 answer
2k views

How to run whatsapp as privately as possible?

I believe it is fairly common knowledge that there are security and privacy concerns regards WhatsApp. The EFF, Ed Snowden, and many others, have expressed concern about the apps' integrity. You don't ...
Pee Jay's user avatar
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1 vote
1 answer
319 views

WhatsApp message from own number + 1 [closed]

I got a WhatsApp message from a number which is exactly mine but the last digit is increased by one (5 instead of 4). It was just a "Hi" and and a photo of a random guy. I asked who it is ...
flappix's user avatar
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0 answers
4k views

Only allowing WhatsApp traffic through firewalls

Problem: On our client's ship, we have an expensive backup internet connection. We want the backup connection to only allow WhatsApp traffic. This way we won't be greeted with an extreme bill because ...
JKrmr's user avatar
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0 answers
117 views

I got a call from a contact on What'sApp and that person says they didn't call me even by accident. Should I be worried about using What'sApp?

I got a call from a contact on What'sApp, and when I picked up there was no audio. The person says they weren't even holding their phone when it happened, and it even took a minute for the call to ...
EphraimRuttenberg's user avatar
1 vote
0 answers
154 views

How Can I Backup App Data In Android/iOS Devices?

After my other post I'm looking over some other possibilities to do what I'm trying to do. How To Recover End-To-End Encrypted Data After Losing Private Key? If I save user data in server, in order to ...
Eagleclaw's user avatar
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13 votes
4 answers
11k views

How To Recover End-To-End Encrypted Data After Losing Private Key?

I'm creating a mobile app which has chat feature in it. Since I wanted to make it secure, I'll do some encryption to messages and the data. I'm thinking of using End-To-End encryption for it but I've ...
Eagleclaw's user avatar
  • 257
0 votes
1 answer
630 views

Radio transmission on my whatsapp voice note

I was sending a voice note to a friend and when I listened to it, the first ~6 seconds were completely normal and then something weird happened. A radio transmission from some radio station (I don't ...
Diego Rodríguez Cid's user avatar
3 votes
2 answers
3k views

Telegram, Signal, WhatsApp: chats encrypted in local storage on mobile devices?

I wonder if the chat content's are encrypted in local storage on mobile devices (iOS, Android). I hardly found any reliable information about this topic. My thought is about somebody stealing my ...
Abid's user avatar
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0 answers
25 views

End-2-end encryption with WhatsApp [duplicate]

I have had recently gone through the horror of transferring WhatsApp conversations when changing phones (android for iPhone). Actually, the thing that it is close to impossible for everyday folk is a ...
T. Maxx's user avatar
  • 145
3 votes
2 answers
1k views

If Whatsapp media messages are e2e encrypted, what is the point of storing popular messages on the server?

There is something I don't understand about whatsapp's privacy policy. Your Messages. We do not retain your messages in the ordinary course of providing our Services to you. Once your messages (...
yukashima huksay's user avatar
3 votes
1 answer
16k views

If I accidentally agree for new WhatsApp's terms and conditions, How to revert that? [closed]

WhatsApp team updates their policy and it will be from Feb 8. I accidentally agreed with the policy. Later I realized the policy is not good. How can I revert my agreement with the WhatsApp team? We ...
Sivaram Rasathurai's user avatar
-1 votes
1 answer
197 views

Following the new WhatsApp data privacy update, why does WhatsApp ask from users, even if they didn't, who is going to check their source code?

New WhatsApp data privacy update, that it will share our data with Facebook, we all know Facebook owns WhatsApp and this is obvious Facebook can always access users of WhatsApp as well. So why to ask ...
fWd82's user avatar
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1 vote
0 answers
151 views

Does it make sense to create a Facebook account so I can tell them not to track me?

Not sure this is the right site to ask this, but here it goes. I've never created a Facebook account, because I don't want people to know about me more than I know about them. But I do have an ...
darthstark's user avatar
7 votes
1 answer
983 views

Does WhatsApp's link preview on the link messages leak information?

When we want to send a message that contains only a link - such as a question from the Stack Exchange network - WhatsApp displays information from the website as below: Does this leak information ...
kelalaka's user avatar
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31 votes
3 answers
11k views

Can I use WhatsApp to securely send public key, symmetric key and private key?

I am asking this because WhatsApp says it is end-to-end encrypted. Are there any problems with sending a public key through WhatsApp? There might be some objections to sending symmetric and private ...
Olle Hudga's user avatar
0 votes
4 answers
2k views

How Whatsapp shows link previews despite E2E encryption?

Someone sends me a link. Whatsapp shows its preview. How can they do that despite being E2E encrypted?
user263210's user avatar
3 votes
0 answers
277 views

What secure mobile messaging app is publicly known to be the most frustrating for state intelligence to read? [closed]

I imagine like either leaked or otherwise published official memos on efforts and signals intelligence programs to intercept and crack different types of communications either lamenting or chronicling ...
Jackie FJA's user avatar
5 votes
1 answer
3k views

Can WhatsApp, Signal or Telegram be hacked through a SIM SWAP attack?

In Cuba the telecoms/ISP monopoly, Etecsa, works with the political police to spy on dissidents, journalists and others. A common attack in Cuba is therefore SIM Swapping which is easy for them. It is ...
Pedro's user avatar
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2 votes
0 answers
2k views

Can someone impersonate you on WhatsApp?

Well I'm not a developer so I'm here to resolve a specific question. I have been investigating this subject for a while now and I need and opinion from experts or developers which really understand ...
fenixcondorperegrino's user avatar
1 vote
0 answers
724 views

WhatsApp logged me out on device - is it a security concern?

I went to bed last night, and put my Android phone into Airplane mode, something I do pretty regularly at night, except when I'm on call. However, this morning my WhatsApp popped up telling me that I'...
Sonique's user avatar
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0 votes
1 answer
488 views

How was I able to login Whatsapp Web when my Phone was turned off and SIM card removed?

I don't have my phone at the moment, since I turned it over yesterday at the shop for a screen replacement. The SIM card is removed and it's sitting in my wallet now. When I opened WhatsApp Web a ...
Snow's user avatar
  • 127
1 vote
1 answer
309 views

Whatsapp suspicious message

Received a message from an unknown individual on WhatsApp messenger. I did not recognize the number (the person is not on my contact list), and there is probably an attachment (4 messages were sent). ...
PerpetualLearner's user avatar
2 votes
1 answer
1k views

Why is uPnP settings in router showing external IP address and WhatsApp as app description?

I was fiddling with my router's uPnP settings and found this: Why is an external IP address showing here? I also did a reverse IP search and to my surprise the IP 25.54.27.39 showed "UK Ministry ...
Bushara's user avatar
  • 21
0 votes
1 answer
2k views

Is group call for Whatsapp P2P or through server like Zoom? [closed]

Number of participants for group call is up to 8 for Whatsapp. Is group call P2P or through Whatsapp server like Zoom due to number of participants?
user215422's user avatar
0 votes
1 answer
3k views

Locate WhatsApp message destination [duplicate]

I've been interested in message tracing, so I played a bit with Cisco's Packet Tracer and Wireshark. Is it possible to locate the destination IP of a message (packages) been sent via WhatsApp? I am ...
Miki's user avatar
  • 1
0 votes
1 answer
1k views

WhatsApp account got "hacked"/hijacked?

I was on a WhatsApp call with my friend (Alice) when the call suddenly dropped. I then immediately opened my chats and noticed an alert in a mutual group that said "Your security code with Alice ...
d.a.vorm's user avatar
  • 113
0 votes
1 answer
2k views

Is it secure to use 3rd party apps like WASender for bulk WhatsApp messaging through WhatsApp web?

A client collects phone numbers through lead form on his website and he is hell-bent on sending WhatsApp instead of email. To build a solution from scratch is out of the question of after some ...
Rahul Agarwal's user avatar
2 votes
3 answers
1k views

Are Whatsapp and Signal truly secure and user-privacy friendly?

I have been learning the famous "SIGNAL MESSAGING PROTOCOL", Its brilliantly designed and perfectly secure , but I doubt on its implementations Famous messenger services like Whatsapp and Signal ...
Chidhambararajan NRM's user avatar
1 vote
1 answer
6k views

Is WhatsApp end-to-end encryption applied to images?

I know that for text, WhatsApp messages are encrypted in a way no "man in the middle" could read them. But what about images? Imagine you received some private image on your smartphone. Then you open ...
Claudio Holanda's user avatar
0 votes
0 answers
230 views

Does Whatsapp/Signal/Telegram have a backdoor access to my message which is a copy of my private encryption key? [duplicate]

Does Whatsapp/Signal/Telegram have a backdoor access to my message which is a copy of my private encryption key?
joeytamlovesecurity's user avatar
0 votes
2 answers
2k views

Protective steps to prevent files sent through WhatsApp from installing malware

I have been reading articles about exploits which allows someone to send an MP4, PDF or other file type through WhatsApp or other service, which self-executes to install malware without any user click ...
help's user avatar
  • 109