What do you call a person who is selective about sharing information/knowledge with others because he/she wants the exclusive/private use of that information/knowledge to his/her own benefit/credit.
For instance, a epicurean who doesn't freely share their latest/greatest finds (i.e., restaurants, where they got their clothes, shoes, accessories, and other products from, etc.), and who will only share with certain people he/she is fond of or wants to impress. He/she doesn't want others to copy or take credit for the privileged/valuable information/knowledge attained.
Thank you!