Encryption and signature schemes are fundamental cryptographic tools for providing privacy and authenticity respectively, respectively, in the public-key setting.

为了提供保密性和认证功能，签字和加密方案是基本的密码学工具，特别是在公钥密码体制中。

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Anyone who has actually done real psychotherapy, in which people really pour out their souls (in my 20s, I practiced psychiatry), knows how dangerous, delicate and often destructive such an exercise can be -- even in the privacy, confidentiality and highly ritualized setting of the doctor-patient relationship.

CNN: Viewpoint: Not Enough Conversation?

If politicians in Washington approve the so-called Marketplace Fairness Act, they'll not only be authorizing extraterritorial tax enforcement, they'll also be setting in motion the creation of a database that will erode privacy for consumers and create opportunities for identity theft.

CNN: What's wrong with Internet sales tax

"The record setting penalty in this matter sends a clear message to all companies under an FTC privacy order, " said Jon Leibowitz, Chairman of the FTC.

ENGADGET: Google to pay $22.5 million to settle FTC charges over tracking cookies in Apple's Safari browser