SNLA462 January   2025 DP83TC817S-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction to MACsec
  5. 2Critical Role of MACsec in Automotive Security
    1. 2.1 Real World Applications
    2. 2.2 Common Security Threats
    3. 2.3 MACsec Security Measures
  6. 3How MACsec Works in a System
  7. 4MACsec Block
  8. 5MACsec at the PHY Level
  9. 6Conclusion

5 MACsec at the PHY Level

The DP83TC817 enables robust MACsec implementation at the PHY level, delivering significant benefits across the entire system.

  • Offloading encryption and decryption tasks from the SoC reduces system resource consumption, leading to lower costs and freeing up the SoC for other critical functions.
  • Implementing MACsec at the PHY level optimizes overall performance, offering a more streamlined and secure data flow while minimizing latency.
MACsec Ethernet PHY Figure 5-1 MACsec Ethernet PHY

MACsec features supported in the DP83TC817:

  • Authentication, encryption at line rate
  • Cipher suites: GCM-AES-XPN-128/256, GCMAES-128/256
  • Secure Channel: Total 16 SAK enabling 8 Tx/Rx SC
  • Auto rollover support for SAK
  • Window replay protection