Personal secure environment for working groups. Decentralized encrypted communication with local data storage (no servers) with secure channels and configurable business logic inside pluggable modules. Protected communications for vulnerable data (e.g. financial information). Encrypted and decentralized design with flexible modules implementing any type of business flow or activity. Custom business logic for collaborative work e.g. in R&D sector starting from working status share to complex calculations. No central server authority, local data storage and granular data transfer management.