Methods and apparatus for encrypted communication

Aspects of the present disclosure relate to an apparatus comprising first interface circuitry to communicate with a first computing device and second interface circuitry to communicate with a second computing device. The first interface circuitry is configured to receive a handshake message from the first computing device. The second interface circuitry is configured to transmit the handshake message to the second computing device and to receive a handshake response message from the second computing device. The first interface circuitry is configured to transmit the handshake response message to the first computing device, whereby to establish a communication session between the first computing device and the second computing device. Apparatus comprises trusted execution environment circuitry to determine a cryptographic session key associated with said communication session, and use said session key to decrypt content of messages transmitted between the first and second computing devices via the apparatus, and analyse said decrypted content.