WASHINGTON — The National Security Agency has implanted software in nearly 100,000 computers around the world that allows the United States to conduct surveillance on those machines and can also create a digital highway for launching cyberattacks. While most of the software is inserted by gaining access to computer networks, the N.S.A. has increasingly made use of a secret technology that enables it to enter and alter data in computers even if they are not connected to the Internet, according to N.S.A. documents, computer experts and American officials.
When a group of cryptographers launched Zerocoin last year, they hoped their cryptography project could upgrade Bitcoin to be as anonymous as its most privacy-focused users have always wanted it to be. Now, after six months of waiting in vain for their code to be adopted by the Bitcoin community, they’re taking a bolder approach: Creating their own cryptocurrency, with privacy baked in from the start.
