A privacy preference editor enables a user to institute privacy preferences relative to user identity information on a card-based and category-based basis. An identity selector furnishes information cards representative of user identities. The editor allows the user to set a privacy preference for each information card. Any proposed disclosure of an information card invokes its corresponding privacy preference. In turn, an agent engine evaluates the invoked privacy preference against the privacy policy of a relying party seeking the card information. The editor also permits the user to create information categories, populate the categories with a group of relevant user identity attributes, and set a privacy preference to the category. In this way, a category-specific privacy preference can be invoked by using the attribute required by the security policy as an index to the appropriate categorized group where the required attribute resides.