She did not want to be known only as the wife of her husband. She insisted on having her own 'identity'. [=on being known for her own qualities, achievements, etc.]
The face of the witness was hidden in order to protect her 'identity'. [=to keep her name from being known]
He has a strong sense of personal 'identity'. [=a strong feeling about exactly the kind of person he is]
(..) You have my thanks. We did not anticipate... We did not know this man would come. This Sherlock Holmes. And now your safety is compromised. I will not reveal your identity. GUNSHOT Sherlock.x.The_Blind_Banker.HDTV_XviD-FoV English SRT Subtitles - UF (v.) Original Subtitles by Red Bee Media Ltd (..)2010 TvShow: Sherlock Title: The Blind Banker Season: 1 Episode 2