Systems for instant messaging private tags preferably comprise a parser for parsing an instant message for sensitive data and an encryption engine for encrypting the sensitive data. In one aspect, a voltage sense circuit utilized in a power supply regulator includes a transformer including a sense winding and an output winding. The measure of conformance between the registry semantic map and consumer service profile is parameterized and chosen by the consumer in advance. A second portion may extend from one end thereof to another end thereof in a direction opposite to the second direction. In the event that the other client is off-line, the client may be connected to a Web page of the other client to leave and retrieve messages.