"obscure identity" is correct and can be used in written English
This phrase generally refers to someone or something that is difficult to identify or is kept hidden. For example, "The thief tried to disguise himself to obscure his identity."
Each revolves around an enigma never fully elucidated: the flight of Jansen, a taciturn photographer; the taboos and secrets of a dubious adult world; and the obscure identity of a character named Pacheco.
He also took a kunya, a kind of nickname that in the Arab world reflects familial relations and endearment but in jihadi circles is also used to obscure identity.
The research has identified foundation of eBay's fraud problem - the inability of eBay's fraud prevention architecture to identify and eliminate rogue traders with obscure identity and questionable reputation.
This can obscure identity and abundance measures from bulk environmental samples.
So the motivation to obscure identities in the book came from them, not me.
On the other hand, while extracellular electrophysiological recordings of neuron activities have the single cell resolution, they are limited to a small subset of neurons with obscure identities.
Covering the face is generally effective in obscuring identity (Burton et al., 1999), but it is also visually and socially salient, and likely to arouse the suspicion of onlookers (Zajonc, 1968).
Obscuring Identity: Q&A With Lynn Hershman Leeson.
Long exposures obscure her identity, which recedes as the figures migrate from body to blur.
Mr. Flemmi, using pliers, yanked out her teeth to obscure her identity.
But a surprising coalition now argues that the government must not obscure directors' identity numbers.
