Marvin Attack: potential key recovery through timing sidechannels

Summary

The [Marvin Attack] is a timing sidechannel vulnerability which allows performing RSA decryption and signing operations as an attacker with the ability to observe only the time of the decryption operation performed withthe private key. A recent survey of RSA implementations found that the Rust `rsa` crate is one of many implementations vulnerable to this attack. No fixed version is available at this time. [Marvin Attack]: https://people.redhat.com/~hkario/marvin/