A new Bill likely to be introduced in the United States Congress in 2011, will enable the Federal Bureau of Investigation (FBI) to tap text messages, emails and networking websites.
According to The Telegraph, the FBI has said that extremists and drug cartels are increasingly communicating online rather than using telephones, leaving US investigators struggling to keep track of them.
"We're talking about lawfully authorised intercepts. We're talking about preserving our ability to execute our existing authority in order to protect the public safety and national security," Valerie Caproni, the FBI's general counsel, said.
Software developers of internet communication services such as Skype and Blackberry which are heavily encrypted, would be required to redesign their products to enable interception.
However, many experts believe that besides ethical objections, the proposal would give rise to significant technical hurdles and encourage more hackers.
"There are lots of really sophisticated attackers out there," he said. "Do we really want to create a new area of attack? It may prevent some crimes but it could lead to new ones," the paper quoted Steven Bellovin, professor of computer science at Columbia University, as saying.
In Britain, encrypted messages can be examined in a criminal investigation under the Regulation of Investigatory Power Act.