ST STM32L5 Series Manuals

Manuals and User Guides for ST STM32L5 Series. We have 1 ST STM32L5 Series manual available for free PDF download: Application Note

ST STM32L5 Series Application Note (56 pages)

Brand: ST | Category: Microcontrollers | Size: 3 MB

General Information
2
Table 2. Glossary
2
Overview
5
Security Purpose
5
Figure 1. Corrupted Connected Device Threat
5
Table 3. Assets to be Protected
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Attack Types
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Introduction to Attack Types
7
Software Attacks
8
Table 4. Attacks Types and Costs
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Hardware Attacks
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Non-Invasive Attacks
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Silicon Invasive Attacks
11
Iot System Attack Examples
12
Figure 2. Iot System
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List of Attack Targets
13
Device Protections
16
Configuration Protection
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Trustzone ® for Armv8-M Architecture
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Dual-Core Architecture
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Figure 3. Armv8-M Trustzone® Execution Modes
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Figure 4. Simplified Diagram of Dual-Core System Architecture
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Memory Protections
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Figure 5. Memory Types
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System Flash Memory
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User Flash Memory
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Embedded SRAM
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External Flash Memories
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STM32 Memory Protections
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Software Isolation
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Debug Port and Other Interface Protection
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Boot Protection
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System Monitoring
22
Secure Applications
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Secure Firmware Install (SFI)
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Root and Chain of Trust
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Stmicroelectronics Proprietary SBSFU Solution
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Secure Boot (SB)
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Secure Firmware Update (SFU)
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Figure 6. Secure Boot FSM
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Configurations
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Arm TF-M Solution
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Figure 7. Secure Server/Device SFU Architecture
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Product Certifications
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Table 8. Basic Feature Differences of Trustzone-Based Secure Software
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STM32 Security Features
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Overview of Security Features
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Static and Dynamic Protections
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Security Features by STM32 Devices
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Table 10. Security Features for STM32L0/1/4/4+, STM32WB, STM32WL Devices
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Readout Protection (RDP)
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Table 11. Security Features for STM32L5, STM32U5, STM32H503/5, Stm32H72X/73/74X/75, Stm32H7Ax/7Bx, STM32F7 Devices
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Figure 8. Example of RDP Protections (STM32L4 Series)
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Lifecycle Management-Product State
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Table 12. RDP Protections
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One-Time Programmable (OTP)
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Trustzone
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Core State
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Secure Attribution Unit (SAU)
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Figure 9. Trustzone® Implementation at System Level
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Memory and Peripheral Protections
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Flash Memory Write Protection (WRP)
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Execute-Only Firmware (PCROP)
34
Secure Hide Protection (HDP)
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Firewall
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Figure 10. HDP Protected Firmware Access
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Figure 11. Firewall FSM
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Figure 12. Firewall Application Example
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Memory Protection Unit (MPU)
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Table 13. Attributes and Access Permission Managed by MPU
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Customer Key Storage (CKS)
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Table 14. Process Isolation
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Figure 13. Dual-Core Architecture with CKS Service
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Antitamper (Tamp)/Backup Registers (BKP)
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Clock Security System (CSS)
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Power Monitoring (PVD)
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Memory Integrity Hardware Check
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Independent Watchdog (IWDG)
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Device ID
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Cryptography
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Hardware Accelerators
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Cryptolib Software Library
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On-The-Fly Decryption Engine (OTFDEC)
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Figure 14. Typical OTFDEC Configuration
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Guidelines
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Table 15. Security Use Cases
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Conclusion
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Appendix A Cryptography - Main Concepts
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Secret Key Algorithms
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Figure 15. Symmetric Cryptography
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Public Key Algorithms (PKA)
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Figure 16. Signature
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Figure 17. PKA Encryption
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Hash Algorithms
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MAC or Signature and Certificate
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Figure 18. Message Hashing
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Figure 19. MAC Generation with Secrete Key Algorithm
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Figure 20. Signature Generation with Public Key Algorithm
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Revision History
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Table 1. Applicable Products
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Table 16. Document Revision History
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Table 5. Memory Types and Associated Protection
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Table 6. Scope of STM32 Embedded Memory Protection Features
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Table 7. Software Isolation Mechanism
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Table 9. Security Features for STM32C0, STM32F0/1/2/3/4, STM32G0/4 Devices
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ST STM32L5 Series Application Note (56 pages)

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