„Incognito” in mandarin I.e. a person trying to hide his/her true identity? I asked Chinese friends but they are providing different options and I’m not sure if there is a direct equivalent of the English word. I’d like to have a traditional characters for this, thanks!
Browsing incognito is the phrase we often see on the internet . according to  this context, we use incognito to anonymously surf the internet and hence no trace is left 

So we say 無痕上網。 痕in this Chinese phrase means trace . This Chinese phrase means surfing the website without trace