Merge pull request #4400 from fritzalder/confidential-computing

Adding confidential computing topic

topics/confidential-computing/index.md

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+---
+display_name: Confidential Computing
+related: trusted-execution, trusted-execution-environment, tee, confidential-container
+short_description: Confidential computing is a security and privacy-enhancing computational technique focused on protecting data in use.
+topic: confidential-computing
+url: https://confidentialcomputing.io/
+wikipedia_url: https://en.wikipedia.org/wiki/Confidential_computing
+---
+Confidential Computing is the protection of data in use by performing computation in a hardware-based, attested Trusted Execution Environment. 
+A Trusted Execution Environment (TEE) is an environment that provides a level of assurance of the following three properties: data integrity, data confidentiality, and code integrity. 
+TEEs may have additional attributes such as code confidentiality, programmability, recoverability, and attestability.
+Confidential Computing aims to reduce the ability for the owner/operator/pwner of a platform to access data and code inside TEEs sufficiently such that this path is not an economically or logically viable attack during execution.