Personal Identifiable Information protection. Wrapper types and traits for secret management which help ensure they aren't accidentally copied, logged, or otherwise exposed (as much as possible), and also ensure secrets are securely wiped from memory when dropped. Secret-keeping library inspired by secrecy.

This solution has such advantages over alternatives:

alternatives have not implemented several traits from the box which are needed
alternatives do not have WeakSecret and Secret differentiation
alternatives do not support masking strategies
alternatives had several minor problems

How to use

To convert non-secret variable into secret use new(). Sample:

expiry_year: ccard.map(|x| Secret::new(x.card_exp_year.to_string())),
// output: "expiry_year: *** alloc::string::String ***"

To get value from secret use expose(). Sample:

last4_digits: Some(card_number.expose())

Most fields are under Option. To simplify dealing with Option, use expose_option(). Sample:

    card_info.push_str(
        &card_detail
            .card_holder_name
            .expose_option()
            .unwrap_or_default(),
    );

Files Tree Layout

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├── src                        # : source code
└── tests                      # : unit and integration tests