Questions tagged [instant-messaging]
Instant messaging (IM) is a form of communication over the Internet, that offers quick transmission of text-based messages from sender to receiver
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Protect from phishing in MS Teams
Yesterday I received an odd message on MS Teams (a phishing attempt) that I've not seen before.
The message is made to look like it includes 2 parties; 1 internal and 1 external, in addition to myself....
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Encrypted messaging app using QR codes for key exchange
I remember seeing an encrypted messaging app a while ago that offered using QR codes to exchange encryption keys between the users. Of course, this only worked when the people met physically, but ...
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Why is this simple encryption protocol not enough for messaging?
Signal Messenger is basically state of the art chat when it comes to security and privacy: It uses only phone numbers for user identification, doesn't store user chat and the encryption protocol is ...
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How can we determine if there is actual encryption and what type of encryption on messaging apps?
There are many new messaging apps that claim to be the most secure.
How can we be certain if there is actual encryption and what type of encryption?
Molly, signal, WhatsApp, briar, wire, telegram, ...
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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The accepted answer to this question is now outdated, since Whatsapp web does not require an online smartphone to function anymore.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?
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Family member received iMessage suggesting a connection/phone breach. What is really happening here?
This family member is an iPhone user. I am an Android user. The messages look normal until a short while ago, when it appears the connection was switched to iMessage. They immediately used another ...
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Is there any way to de-link a secure messenger (Telegram/Signal/WhatsApp) from phone number?
I understand, that mobile phone verification is probably the most convenient way to validate real users and avoid spam, but those "secure/private" messengers are afterward still bound to ...
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What technical challenges prevent non-centralized messaging apps from servicing billions of users? [closed]
The most popular messaging apps to date (e.g. telegram), even those that are "privacy by design" (e.g. signal, threema), are centralized.
What technical challenges prevent peer-to-peer (e.g. ...
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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 ...
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Group Instant Messaging: How to securely store messages on the backend while supporting cross-device message history in a group chat?
I want to build a group chat app where messages are transmitted and stored as securely as they can be, but where the message history is still visible after you or others in the group have changed ...
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Deauthorization Bug in messenger application - How serious is this?
My question refers to a behavior on a production system with more than 100 million chat users.
Some time ago I changed my account password and removed all devices connected to my account.
The next day ...
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Do the Secret Chats of Telegram really support Perfect Forward Secrecy?
In the Telegram API it is stated that Telegram support Perfect Forward Secrecy in their "secret chats". It is also stated that
official Telegram clients will initiate re-keying once a key has been ...
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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 ...
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Required a simple guide for secure messaging application
For my personal research, I have to create a messaging app, but security is only important part of application, security from MITM (man in the middle attack), at device end, and at server level. (note:...
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Forward secrecy (plausible deniability) and storing messages
How do messengers, like signal or XMPP-omemo messengers, store their messages?
Since the session key is only valid for the current session, how can such extensions like MAM (message archiving on XMPP ...
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