"To do this, the CPU measures the Trusted Computing Base, which includes the boot firmware, operating system kernel and application binaries and saves it into secure hardware registers. It then signs this measurement using a private attestation key embedded in the CPU. This produces a cryptographic attestation report that a remote verifier can check to confirm the enclave's authenticity and integrity."
"Most blockchain technology relies on cryptography and distributed computing to maintain security. TEEs add a different approach, namely, hardware-level trust. A Trusted Execution Environment is an isolated area within a device processor that is designed to keep data and code tamper-proof and confidential during execution. The resulting secure enclave is inaccessible to the rest of the operating system and can prove to third parties through remote attestation what instructions it is executing."
"Leveraging this hardware-level trust for confidential smart contract execution requires that blockchain nodes use chips with a TEE. This requirement typically applies to nodes that are responsible for transaction as well as block validation and offchain computation. In a layer-1 setup, consensus nodes continue to replicate an encrypted version of each contract's state as part of the global ledger. Each of the nodes contains a TEE that replicates the decryption, plaintext execution and reencryption of ev"
Trusted Execution Environments (TEEs) provide hardware-level trust by creating isolated processor enclaves that keep data and code tamper-proof and confidential during execution. Secure enclaves are inaccessible to the operating system and can demonstrate executed instructions through remote attestation. The CPU measures the Trusted Computing Base—including boot firmware, kernel and application binaries—and signs the measurement with a private attestation key to produce a cryptographic attestation report. Blockchain nodes that use TEEs can perform confidential smart contract execution, requiring chips with TEEs on nodes responsible for transaction and block validation and off-chain computation. In layer-1 setups, consensus nodes replicate encrypted contract state on the global ledger.
Read at cointelegraph.com
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