Well, that tech really progressed fucking fast. We went from calculators being a huge industry of mechanical and electro-mechanical monsters to wristwatch calculators sold for 20 bucks in like a couple decades.
Go look at asianometry for some interesting videos on the matter
That’s not how it works. The US spends per capita a lot more than pretty much every other country on healthcare, and yet it has huge issues with providing decent care to all its people. Why? Because it’s by design. There are enough money in the system, right now, to remove completely health insurance, put everyone under public health insurance, provide world leading care to everyone and have money left over. We are talking $6,000 per capita yearly spent by Canada vs $13,000 by the US, in 2021.
But then do you have any idea how much value would be lost for shareholders? The proposal is just insane
You are right, we don’t and can’t know if any of what Meta says is true, but at least on the surface it seems to check out. If they are stealing your private key and unlocking all your chats in secret, then they are doing a bloody good job, since no one has leaked anything yet.
Just to clear things a bit, in your analogy you don’t hand the courier both the chest and the key. The chest has a special keypad that accepts two keys, one is your key, the other is the recipient’s key. What you do is you lock the chest with your key and then give it to the courier, which will deliver the chest to the other party, which will then open the chest with his key. In theory the courier never had access to the key.
Now the issues are that you are indeed writing your message from within the Whatsapp building and you can never know if there cameras watching you or not. You also cannot know if Whatsapp has made a copy of your key, or the recipient’s key without your knowledge.
As for how can you recover all your chat history even after you destroy your phone, it’s quite easy and Whatsapp doesn’t need to know anything in particular. The functionality allows you to make a backup and store it on Google Drive. That backup gets encrypted with your password and it’s probably the most secure thing of all, if nothing else because Meta would gain nothing from the backup having poor security (as it would already have all the data if they wanted it) while it would only make them loose face, plus would allow anyone else to gain access to all ~~your ~~their data. After you restore the backup on a new device a new key+padlock pair gets created and the lock gets shared to all your contacts (which will see the yellow box telling them your padlock has changed).
I’m not claiming it doesn’t have privacy issues mind you, I’m just saying that you can’t be sure either way, unfortunately. Still, better than Telegram that doesn’t even encrypt most of your chats.
Initially you could only log in from one device, as it created a new private key every time you switched device. Then they implemented Whatsapp Web, which essentially required the primary device to be connected to the internet, the chats would then be transferred from the primary device to the secondary devices (I assume through an encrypted tunnel of some sorts). Then as of late they have implemented a new technology that allows you to share your private key among multiple devices, making them all the “primary device”. The chat history and all the messages can be shared from one device to another while encrypted. The weak spot at one point was the chat backup, which was unencrypted and stored in your Google Drive, so technically Google could have had access to all your chats. Today though, you can encrypt the backup through a password.
In theory Whatsapp has never needed to read your chats to have the functionality it has. That’s in theory because it’s closed source and we cannot know anything for certain. All this is just what Meta/Whatsapp said or pure speculation.
Firefox has the same problem with V3, it has nothing to do with the browser
Didn’t they say they will implement V3, but change it slightly to allow extensions like ublock origin to block web requests? Also I’m pretty sure there’s still no timeline for any deprecation of V2 in FF, unlike for Chrome, which will disable all V2 extensions.