Been catching up with the news lately, stumbled upon allegations against Micron [0] (does anyone remember Bloomberg's SuperMicro scoop?).
How does one put backdoors in DIMMs? Flash memory? What is the threat model? Assuming airgapped computers, will a memory backdoor simply xmit secrets in an RF side channel?
[0] https://www.theregister.com/2023/04/01/china_micron_probe/