The ones that went through FIPS 140-2 Type 3 or above validation are legit. We used Apricorn for CUI data…examples: https://www.archives.gov/cui/registry/category-list
I went with Kanary because it covered quite a lot and it is frequent, at least once a month - but EasyOptOuts does look like it’s worth the money.
someone trying to sell more copies of their book…cool story bro
The ones that went through FIPS 140-2 Type 3 or above validation are legit. We used Apricorn for CUI data…examples: https://www.archives.gov/cui/registry/category-list