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The Internet affords anonymity（匿名） 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 36_across the Web.
Can privacy be preserved 37__ bringing safety and security to a world that seems increasingly 38___ ？
Last month， Howard Schmidt， the nation‘s cyber-czar， offered the federal government a 39___ to make the Web a safer place-a “voluntary trusted identity” system that would be the high-tech 40___ of a physical key， a fingerprint and a photo ID card， all rolled 41__ one. The system might use a smart identity card， or a digital credential 42___to a specific computer .and would authenticate（证实） users at a range of online services.
