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Yes, that could be done with e2e encryption. Typically a setup would use one secret key for crypting one (set of) message(s) and that key would be encrypted in
by johannes1234321 7y ago
Yes, that could be done with e2e encryption. Typically a setup would use one secret key for crypting one (set of) message(s) and that key would be encrypted in a way that all authorized users can decrypt it. A new user then only needs access to the group key, which can be done cheaply (by anybody with access to the group key and all user's public keys)