Secure element for Sigfox LPWAN network

STSAFE-A1SX

The STSAFE-A1SX is a secure element that comes preloaded with Sigfox network keys, and provides secure services for data exchanges on the Sigfox’s low-power wide-area network (LPWAN). It constitutes a plug-and-play solution that allows Sigfox Ready™ IoT (Internet of things) devices to connect to the Sigfox network while ensuring data integrity and confidentiality. The STSAFE-A1SX is a highly secure, tamper-resistant solution that relies on a certified, secure EAL5+ Common Criteria chip, on top of which runs a dedicated secure operating system.

Key Features

Data integrity over the Sigfox network:
- Signature of payloads before uplink
- Verification of downlink payloads
Optional data confidentiality over the Sigfox network:
- Encryption of payloads before uplink
- Decryption of downlink payloads
Security features
- Latest generation of highly secure MCUs
  - CC EAL5+ AVA_VAN5 Common Criteria certified
  - Active shield
  - Monitoring of environmental parameters
  - Protection mechanism against faults
  - Unique serial number on each die
  - Protection against side-channel attacks
- Advanced symmetric cryptography
  - AES-128
- Secure operating system
  - Secure STSAFE-A1SX kernel for authentication and data management
  - Protection against logical and physical attacks
Hardware features
- Highly secure MCU platform
- 6kB of configurable non-volatile memory
  - Highly reliable CMOS EEPROM technology
  - 30 years data retention at 25°C
  - 500.000 erase/program cycles endurance at 25°C
  - 1.62V to 5.5V continuous supply voltage
Protocol
- I²C-bus slave interface
  - Up to 400kbps transmission speed (Fast mode) and true open-drain pads
  - 7bit addressing