APIC fail: Intel 'Sunny Cove' chips with SGX spill secrets

A group of computer scientists has identified an architectural error in certain recent Intel CPUs that can be abused to expose SGX enclave data like private encryption keys. They call it ÆPIC Leak because it affects the memory-mapped registers of the local Advanced Programmable Interrupt Controller (APIC), which helps the CPU …

[Duncan Macdonald]

In other words

If secrecy is important - do not use a machine shared by other people. "The Cloud" is the modern version of a shared mainframe and any user is depending on many unseen people and bits of software and hardware to secure their data from others. If you can not trust all these unknown people and hardware/software bits to secure the data then you should not use the cloud for important data.