contact-tracing

This crate implements the apple/google proximity contact tracing.

The version of this implementation is the initial reference spec from April 2020.

Features

• chrono: Adds timestamp operations to all structs (on by default)
• serde: Adds serde support (implies base64)
• base64: Adds base64 encoding/decoding through Display and FromStr

Broadcast Example

To broadcast one needs a tracing key and the rolling proximity identifier (RPI) for a given time. The RPI is normally created from the daily tracing key but there is a shortcut to derive it automatically:

```rust use contact_tracing::{TracingKey, DailyTracingKey, Rpi};

let tkey = TracingKey::unique(); let rpi = Rpi::for_now(&tkey); ```

Infection Checking Example

Infection checking uses the daily tracing keys directly:

```rust use contact_tracing::{TracingKey, DailyTracingKey, Rpi};

// normally these would come from the internet somewhere let tkey = TracingKey::unique(); let dtkey = DailyTracingKey::for_today(&tkey);

for (tin, rpi) in dtkey.iter_rpis().enumerate() { // check your database of contacts against the TIN and RPIs generated // for each daily tracing key downloaded. The TIN should be within // some reasonable window of the timestamp you captured. } ```

License: Apache-2.0