Welcome to the official website of Massimo (MAX) Russo: indie developer, mathematics and cryptography enthusiast, and creator of MAX App, Tac! and Clo-E.
Here you will find math-based digital security (MAX App), human voice reminders (Tac!) and a minimal, elegant clock (Clo-E) — three different ways of using technology with less friction, less data, and more control in your hands.
MAX App is my flagship project: a mathematical identity
that stays on your device and uses post-quantum cryptography.
Tac! and Clo-E are smaller, focused tools designed to make everyday life simpler and calmer.
The following points summarize the core ideas behind MAX App: a mathematical identity, built locally on your device, designed for the post-quantum era.
In MAX App, your identity is not an email address: it is a set of cryptographic keys deterministically derived from your phrases, only on your device. Each module (Login, Chat, Vault, Signature) uses different keys, so any potential compromise remains confined to that single module.
No personal data is required to use MAX App. Zero phone numbers, zero profiles, zero tracking. The server only sees public keys, SPHINCS+ signatures, and encrypted packets (FrodoKEM + MX²), without ever knowing your phrases or your private key.
MAX App is built on SPHINCS+ for signatures, FrodoKEM for key exchange, and MX² for local symmetric encryption. Protocols designed for the post-quantum era and verifiable from the outside as well, by exporting packets that can be checked with independent tools.
For collaborations, technical analysis, or proposals:
