How would you write a journal/diary with the adversaries being both the people you live with AND your government?

A paper-only journal would defend against the state, but not against people you live with. A digital journal can be encrypted, but an intelligence agency could potentially gain access (like, them reading your anti-government rants that may involve violence... that sort of stuff).

So... how to defend against both threats?

(Also, I just realized, paper journals cannot really be easily backed up...)