cloak in secrecy
cloak (someone or something) in secrecy
To hide someone or something from another person or from public view. The residents complained that the board cloaked its decision process in secrecy, not allowing anyone to see the final plan.
cloak someone or something in secrecy
Fig. to hide or conceal someone or something in secrecy. Patrick cloaked his activities in secrecy. The agents cloaked the spy in secrecy, making her identity a mystery.