Switch to DCAP attestation

[clangenb]

So far we have always been skipping the remote attestation process because we did not run the worker on an SGX-machine. Now that the SGX-infrastructure has been set up, we can actually do remote attestation. However, the current state of the worker does only allow IAS remote attestation, which needs an Intel licence. Obtaining a development licence is very easy quick and can be done here: https://api.portal.trustedservices.intel.com/EPID-attestation.

However, obtaining a production licence might take up to six months. Hence, we suggest using DCAP remote attestation, which simply needs an upgrade of the worker to upstream.

Blocked by

• Upgrade worker to upstream #45

[clangenb]

Done