A method of detecting a content desired to be detected includes receiving electronic data at a first host, determining a checksum value using the received electronic data, sending the checksum value to a processing station, the processing station being a second host that is different from the first host, and receiving a result from the processing station, the result indicating whether the electronic data is associated with a content desired to be detected. A method of detecting a content desired to be detected includes receiving electronic data at a receiving station, and determining whether the received electronic data is associated with a content desired to be detected, wherein the receiving station does not include content detection data for identifying the content desired to be detected.