(DAILYMAIL) — Facebook, Twitter and Google have been caught snooping on messages sent across their networks, new research claims, prompting campaigners to express concerns over privacy.

The findings emerged from an experiment conducted following revelations by US security contractor Edward Snowden about government snooping on internet accounts.

Cyber-security company High-Tech Bridge set out to test the confidentiality of 50 of the biggest internet companies by using their systems to send a unique web address in private messages.

  • Text smaller
  • Text bigger
Note: Read our discussion guidelines before commenting.