this post was submitted on 04 Dec 2024
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Privacy
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Why are these apps getting hacked? Wouldn't just RSA 2048 be enough?
Probably an implementation issue. Make a small error there, like storing parts of a key in memory or something like that and you've compromised security.
Encryption is easy, key exchange is not
Encryption is really really hard, and avoiding some form of sidechannel attack is much much harder.
Sure key exchange also isn't trivial, but I would say that key exchange is significantly easier. Care to elaborate?
Encryption is trivial. Getting a reliable keystream is not.
It all depends on the framing 😁
The real matrix's key exchange is pretty headacheless, is there any downsides to it?
RSA doesn't scale, so if the message is large then RSA becomes unwieldy. So most encryption methods that make use of RSA actually encrypt the data with a symmetric algorithm, and then just encrypt the key for the symmetric data using the RSA key.
But there is still way way way too many ways to implement crypto wrong, which can completely compromise the security of it.