17. A non-transitory computer-readable medium having computer-executable instructions that, when executed, cause a processor to: manage a plurality of user identities of a user, and select one or more of the user identities of the user that satisfy a set of identity requirements of a security policy obtained from an environment; evaluate at least one privacy preference of the one or more selected user identities against a privacy policy obtained from the environment; and generate a reduced version of a privacy policy from the environment and supply the reduced version of the privacy policy as the privacy policy used by the privacy engine evaluation.
20. The non-transitory computer-readable medium of claim 17 , wherein the instructions further cause the processor to: provide at least one information card; receive from the environment a security policy having requirements; process the security policy to determine whether any of the information cards satisfies the security policy requirements; and cause the evaluation operation to use the privacy preference of any information card determined to satisfy the security policy requirements.