Technology preview: Private contact discovery for Signal
https://signal.org/blog/private-contact-discovery/ [signal.org]
2017-09-26 21:04
However, we can invert the traditional SGX relationship to run a secure enclave on the server. An SGX enclave on the server-side would enable a service to perform computations on encrypted client data without learning the content of the data or the result of the computation.
Unfortunately, doing private computation in an SGX enclave is more difficult than it may initially seem.
source: L