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MACsec Recently IEEE 802.1ae proposed a security mechanism based on AES-128, but with a new mode - Galois Counter Mode SecTAG contains MACsec Ethertype (88E5) 4B Packet Number (sequence number) 8B Secure Channel Identifier … DA SA Type payload FCS DA SA secure data FCS’ SecTAG (incl. IV) ICV integrity optional confidentiality 12 B Initialization Vector |