Diary is a TUI program written in Rust for GNU/Linux / *BSD / Android (It probably works on other platforms too, but who cares) that helps you write a digital journal from the comfort of a TUI. It ecrypts both text and file data,
Cupcake is an efficient Rust library for the (additive version of) Fan-Vercauteren homomorphic encryption scheme, offering capabilities to encrypt vectors, add/subtract two encrypted vectors, and rerandomize a ciphertext.