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i do want to talk about certificates at some point but kind of the way that the certificates work is that they have these really important digital signatures at the bottom and they kind of underpin the whole thing so rob did a video already on public key cryptography which is a really good watch and you should definitely you know check that out so if you recall in public key you have a public key and you have a private key and theyre kind of the inverse of one another so you can encrypt with one and decrypt the other one so i can for example if you have a public key i can encrypt something with it and send it to you right but actually we dont tend to do that very often we could do that but encryption with something like rsa is not that quick and for very long messages becomes a little bit impractical there are other reasons as well in terms of the fact that we use these keys for very long time and people prefer to rotate keys more often so these days for actual encryption what we wo
