It sounds like they are making the claim that they can revoke access to data immediately, but they say you don't need to store the content on-device. I looked up "key displacement" and can't find any immediate references, though I'm not an expert.
My understanding is that if I acquire a ciphertext encrypted with key v1, I will always be able to decrypt it. Any "asynchronous" protocol will have this problem, right? I can be revoked access if I need a piece of the key from a trusted party or if that v1 of the ciphertext can be guaranteed deleted, but caching old versions of keys and files means I will always retain access to the versions of files I ever had access to.
Could someone with a bit more understanding shed some light on this?
I really wish they got more into the nuts and bolts of what this is in terms of the end user.
Some of the screenshots have things mentioned like passport / drivers license. However it also sounds more like a collaboration tool with chat and image sharing.
I suppose time will tell, but I think it would have been wise to explain more before asking for money as that was a bit of a turn off for me.
I am really interested in this in general, I just don't know if I can make my people use yet another privacy-focussed app.
This is not strictly for communication I know but if there is any collaborative component, it will be a tough sell to convince others (esp. in the US).
Most people have gotten tired of this and just don't care, it is quite frustrating.
gorgonical|4 years ago
My understanding is that if I acquire a ciphertext encrypted with key v1, I will always be able to decrypt it. Any "asynchronous" protocol will have this problem, right? I can be revoked access if I need a piece of the key from a trusted party or if that v1 of the ciphertext can be guaranteed deleted, but caching old versions of keys and files means I will always retain access to the versions of files I ever had access to.
Could someone with a bit more understanding shed some light on this?
woofcat|4 years ago
Some of the screenshots have things mentioned like passport / drivers license. However it also sounds more like a collaboration tool with chat and image sharing.
I suppose time will tell, but I think it would have been wise to explain more before asking for money as that was a bit of a turn off for me.
ruph123|4 years ago
This is not strictly for communication I know but if there is any collaborative component, it will be a tough sell to convince others (esp. in the US). Most people have gotten tired of this and just don't care, it is quite frustrating.
jcuenod|4 years ago