A computer implemented method for managing communication of a plurality of response messages to a plurality of participants via a network, the plurality of response messages including a first response message responsive to a first request message previously received from a first participant of the plurality of participants, the first response message including data intended to be received by the plurality of participants, the first response message intended to be identified by at least the first participant as being associated therewith and responsive to the first request message, the other participants of the plurality of participants being unable to identify the first participant, the association of the first response message therewith, or an association of the first response message with another of the plurality of response messages as being responsive to request messages from a particular participant of the plurality of participants, the method comprising: generating, by a processor, a first message identifier that has not been previously generated or is not in use, the first message identifier comprising a predictable component and a substantially random component, the message identifier not including any data indicative of the identity of any of the plurality of participants, wherein the predictable component is operative to reduce uniqueness of the first message identifier and accelerate determination of whether the first message identifier has not been previously generated or has been included in a previously generated response message transmitted at a prior earlier time preceding the current time by more than a threshold value; associating, by the processor, the first message identifier with the first participant and store the association in a memory coupled with the processor; communicating, by the processor, the first message identifier to the first participant such that the first message identifier is known to the first participant and is associated with the first request message; receiving, by the processor, the first request message, determining the first message identifier associated therewith, generating the first response message including the associated first message identifier and transmitting the first response message to the plurality of participants, the first participant's knowledge of the first message identifier being operative to allow identification of the first response message by the first participant as being associated therewith, wherein other participants of the plurality of participants lacking knowledge of the association of the first message identifier with the first participant thereby being unable to identify the first response message as being associated therewith. generating, by a processor, a first message identifier that has not been previously generated or is not in use, the first message identifier comprising a predictable component and a substantially random component, the message identifier not including any data indicative of the identity of any of the plurality of participants, wherein the predictable component is operative to reduce uniqueness of the first message identifier and accelerate determination of whether the first message identifier has not been previously generated or has been included in a previously generated response message transmitted at a prior earlier time preceding the current time by more than a threshold value; associating, by the processor, the first message identifier with the first participant and store the association in a memory coupled with the processor; communicating, by the processor, the first message identifier to the first participant such that the first message identifier is known to the first participant and is associated with the first request message; receiving, by the processor, the first request message, determining the first message identifier associated therewith, generating the first response message including the associated first message identifier and transmitting the first response message to the plurality of participants, the first participant's knowledge of the first message identifier being operative to allow identification of the first response message by the first participant as being associated therewith, wherein other participants of the plurality of participants lacking knowledge of the association of the first message identifier with the first participant thereby being unable to identify the first response message as being associated therewith.