Finally found the link after remembering that I read about this somewhere: "David A. Wheeler’s Page on Fully Countering Trusting Trust through Diverse Double-C

Finally found the link after remembering that I read about this somewhere: "David A. Wheeler’s Page on Fully Countering Trusting Trust through Diverse Double-Compiling (DDC) - Countering Trojan Horse attacks on Compilers" https://dwheeler.com/trusting-trust/ https://dwheeler.com/trusting-trust/