The state of being pseudonymous, of hiding one's true identity behind a pseudonym(noun)
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Use "pseudonymity" in a sentence
"Everything that he wrote while safely wrapped in pseudonymity is public."
"Perhaps being away from the blog, and in the “real world” of my work and the bloggers I know who function in it, I realized that to continue writing this sort of a blog, my pseudonymity is no longer viable."
"I am almost grateful (though I’m not sure Publius is) to Whelan for his puerile display of pique, since it at least has brought this conversation to the fore, and has highlighted why pseudonymity is an integral part of Internet media."