The UK's GCHQ -- like its US counterpart the NSA -- is an agency traditionally shrouded in secrecy. Tasked with the job of spying on all and sundry in the name of intelligence gathering, the agency has just joined Twitter, greeting other users with an unoriginal "Hello, world". With the concerns about privacy and security that blew up in the wake of Edward Snowden's NSA surveillance revelation, spy agencies around the world have been on a mission to boost their public image. GCHQ -- complete with the blue tick reserved for verified accounts -- will use Twitter to "provide news,… [Continue Reading]