Cloaking

Hey ya’ll! I’m working on some sigils and I have an idea for a cloaking sigil, but before I begin work on it I’d like to do some reading into cloaking. Anyone know any good sources for cloaking? I’ve checked online and mostly got Pinterest and a Wikipedia page for a cloak of invisibility. And I guess an additional question would be; can sigils be used as part of cloaking?