I don’t trust corporations. I trust math, and code, and systems design. I trust AES-256, even though the NSA picked it, because 20 years of cryptography research has revealed nothing close to a break. I trust SELinux, even though NSA invented it, because hundreds of kernel devs from around the world have audited it and touch that code regularly. I trust even proprietary systems which have been extensively independently audited and reverse engineered by security researchers, though I do trust them less.