Secure Anonymous Chat Application

I need a chat application that runs on both web and mobile platforms. The app must incorporate military-grade encryption to ensure the highest level of security.

Key Features:
- Military-grade encryption
- Self-destructing messages
- Two-factor authentication
- IP masking

Ideal Skills and Experience:
- Expertise in encryption technologies
- Experience in developing secure chat applications
- Familiarity with self-destructing message functionality
- Knowledge of two-factor authentication implementation
- Background in IP masking techniques

Please provide examples of similar work done and an estimated timeline.