# Signal's Usage of SGX Links: [[Signal]], [[SGX]] ## [Technology preview: Private contact discovery for Signal](https://signal.org/blog/private-contact-discovery/) By [[Moxie Marlinspike|Moxie]] on [[2017-09-26]] - Signal is worried about malicious operating systems inferring contact relationships using memory access patterns - Uses oblivious RAM techniques and other software mitigations in combination with SGX - Advised by [[Raluca Ada Popa]]