One embodiment of the present invention provides a system that camouflages business-activity information in telemetry signals from a computer system. During operation, the system monitors telemetry signals from the computer system to obtain a time series containing a telemetry metric which provides business-activity information. Next, for each telemetry-metric value contained in the time series, the system compares the telemetry-metric value with a predetermined threshold level. If the telemetry-metric value is below the predetermined threshold level, the system then generates artificial activity associated with the telemetry metric in the computer system, so that the artificial activity causes the telemetry-metric value to exceed the predetermined threshold level.