What Does Pseudonym (nym) Mean?
A pseudonym (nym) is a name used in place of one’s given (or “real”) name. Examples of pseudonyms in the computer world include usernames and handles, which are frequently used when accessing websites or posting comments.
Techopedia Explains Pseudonym (nym)
Besides their many common uses, pseudonyms are also employed to hide malicious computer actions. Malicious posters on social networking sites can mask their identities with pseudonyms. Similarly, pseudonymous remailers can be used to propel users to illegitimate websites.