This is a user manual for CardOS/M4.0 chipcard operating system, which introduces the usage and security of the operating system
This manual describes the architecture and security features of the CardOS/M4.0 chip‑card operating system, including data security concepts, cryptographic algorithms (DES, 3DES, RSA, SHA‑1) and secure messaging modes. It also explains the life‑cycle phases, protection mechanisms and the format of objects used by the system.
The document lists all supported commands, their parameters and the corresponding status codes. It includes tables of SW1/SW2 codes, usage rules for PIN verification, and guidelines for compatibility with ISO 7816‑4. The manual serves as a reference for developers and integrators working with Siemens smart‑card solutions.