CAREER: Efficient Cryptographic Protocols for Secure and Private Electronic Transactions

NCS-0347661 CAREER：用于安全和私人密码交易的高效密码协议PI：Anna Lysyanskaya一个典型的计算机用户每天执行大量电子交易：阅读电子邮件、管理银行账户、进行在线购物，仅举几例。它们中的每一个都必须是安全的：它们只能由授权用户执行，并且输入的信息必须是真实的。另一方面，每笔交易都应该是私人的：没有用户的明确同意，个人信息或账户余额不应该变得可用。由于数据聚合很容易进行，因此在不影响其真实性的情况下，将每个交易中传输的信息限制在最低限度是非常必要的。实现这一点的密码方案是本研究预期的直接结果。本项目调查安全和私人电子交易系统将包括的基本协议的安全要求，并开发有效和可证明安全的数字签名方案和其他有助于设计此类协议的原语。实现这些结果的主要方法是使用实际的构建块建立在现有的高度理论的基础上。由于该项目制定了个人信息不会被滥用的可证明保证，其更广泛的影响是在保护计算机用户的隐私方面。

NCS-0347661CAREER: Efficient Cryptographic Protocols for Secure and Private Cryptographic TransactionsPI: Anna LysyanskayaA typical computer user performs a multitude of electronic transactions each day: reading e-mail, managing bank accounts, making on-line purchases, to name a few. Each of them must be secure: they should be carried out by authorized users only, and the information entered must be authentic. On the other hand, each transaction should be private: personal information or account balances should not become available without a user's explicit consent. Since data aggregation is simple to do, it is highly desirable to limit the information transmitted in each transaction to a bare minimum without compromising its authenticity.Cryptographic schemes that make this possible are the intended direct outcome of this research. This project investigates the security requirements of the basic protocols that a system for secure and private electronic transactions would comprise and develops efficient and provably secure digital signature schemes and other primitives that lend themselves to the design of such protocols. The chief method for achieving these results is to build upon existing highly theoretical foundations using practical buiding blocks.Since this project develops provable guarantees that personal information will not be abused, its broader impact is in protecting the privacy of computer users.