In addition, the affidavit accused him of compromising electronic surveillance methods.

As the authors discuss, as any other surveillance method, theirs has limitations.

Computer software programs as well as other surveillance methods are used to monitor network traffic on this Web site for security purposes.

"Our surveillance methods were not as comprehensive then," Calazar commented.

"We don't want to disclose the time frames we have used" to protect the exchange's surveillance methods.

He also said the police had a special problem because the courts did not accept electronic surveillance methods as sources of legitimate evidence.

Asking questions about surveillance methods, she discovered that some of the agencies were operating "close to the wind legally."

Improved surveillance methods allow us to better direct our programs and resources to the populations most affected.

Thus, the source of infection in such people might not be detected by current surveillance methods, the epidemiologists said.

Only someone with a profound knowledge of surveillance methods could have fingered them for what they really were.