The Internet affords anonymity to its users, a blessing to privacy and freedom of speech. But that very anonymity is also behind the explosion of cyber-crime that has_____（1）across the Web.
Can privacy be preserved_____（2）bringing safety and security to a world that seems increasingly_____（3）？
Last month, Howard Schmidt, the nation’s cyber-czar, offered the federal government a_____（4）to make the Web a safer place—a “voluntary trusted identity” system that would be the high-tech_____（5）of a physical key, a fingerprint and a photo ID card, all rolled_____（6）one. The system might use a smart identity card, or a digital credential_____（7）to a specific computer, and would authenticate users at a range of online services.
The idea is to_____（8）a federation of private online identity systems. User could_____（9）which system to join, and only registered users whose identities have been authenticated could navigate those systems. The approach contrasts with one that would require an Internet driver’s license_____（10）by the government.
Google and Microsoft are among companies that already have these “single sign-on” systems that make it possible for users to_____（11）just once but use many different services.
_____（12）, the approach would create a “walled garden” in cyberspace, with safe “neighborhoods” and bright“streetlights” to establish a sense of a_____（13）community.
Mr. Schmidt described it as a “voluntary ecosystem” in which “individuals and organizations can complete online transactions with_____（14），trusting the identities of each other and the identities of the infrastructure_____（15）which the transaction runs”
Still, the administration’s plan has_____（16）privacy rights activists. Some applaud the approach; others are concerned. It seems clear that such a scheme is an initiative push toward what would_____（17）be a compulsory Internet “driver’s license” mentality.
The plan has also been greeted with_____（18）by some computer security experts, who worry .that the “voluntary ecosystem” envisioned by Mr. Schmidt would still leave much of the Internet_____（19）.They argue that all Internet users should be_____（20）to register and identify themselves, in the same way that drivers must be licensed to drive on public roads.
