That requires access to the actual phone and the unlock code in the case of WhatsApp (you need to identify to add a WhatsApp web client).
For telegram it's a bit easier yes, but the user can set up an additional password. I have done so of course. Note that telegram is not E2EE so they can give your stuff to the police at any time unlike WhatsApp and signal.
For signal I don't know as I don't really use it but i understand it works the same way as WhatsApp, scan a QR code and authenticate to the phone.
Also, with all 3 systems it's clearly visible when you look at the linked systems.
It is possible to intercept text messages and phone calls in such a way that the recipient never even knows a text message or phone call was sent to them in the first place. SMS is an extremely insecure channel for handling authentication codes.
Yes I know but when you want to link a WhatsApp Web client to a phone with WhatsApp, SMS is not used. You need to scan a QR with the phone in question and sign in to the phone.
SMS is used to register WhatsApp to a new phone, but that signs the original phone out. Also, you need the pin code that WhatsApp forces you to set. If you don't have it you have to wait a week if you got a recycled number. Also the original account holder is notified you tried it.
So this method cannot be used by the police to snoop unnoticed. I believe signal works the same as WhatsApp here, it also forces you to set a pin now.
For telegram this can be used yes but you can set an optional extra password. And also like I said telegram is not E2EE anyway so it's open to warrants.
That requires access to the actual phone and the unlock code in the case of WhatsApp (you need to identify to add a WhatsApp web client).
For telegram it's a bit easier yes, but the user can set up an additional password. I have done so of course. Note that telegram is not E2EE so they can give your stuff to the police at any time unlike WhatsApp and signal.
For signal I don't know as I don't really use it but i understand it works the same way as WhatsApp, scan a QR code and authenticate to the phone.
Also, with all 3 systems it's clearly visible when you look at the linked systems.
It is possible to intercept text messages and phone calls in such a way that the recipient never even knows a text message or phone call was sent to them in the first place. SMS is an extremely insecure channel for handling authentication codes.
https://youtu.be/wVyu7NB7W6Y
Yes I know but when you want to link a WhatsApp Web client to a phone with WhatsApp, SMS is not used. You need to scan a QR with the phone in question and sign in to the phone.
SMS is used to register WhatsApp to a new phone, but that signs the original phone out. Also, you need the pin code that WhatsApp forces you to set. If you don't have it you have to wait a week if you got a recycled number. Also the original account holder is notified you tried it.
So this method cannot be used by the police to snoop unnoticed. I believe signal works the same as WhatsApp here, it also forces you to set a pin now.
For telegram this can be used yes but you can set an optional extra password. And also like I said telegram is not E2EE anyway so it's open to warrants.