# Security

## Reporting Vulnerabilities

If you find a security issue in Threema, please follow responsible disclosure
and report it to us via Threema or by encrypted email, we will try to respond
as quickly as possible. You can find the contact details at
[threema.ch/contact](https://threema.ch/contact) (section “Security”).

## Cryptography Whitepaper

The algorithms and design decisions behind the cryptography are documented in
the [Cryptography Whitepaper](https://threema.ch/press-files/2_documentation/cryptography_whitepaper.pdf).