CAREER: Efficient Cryptographic Protocols for Secure and Private Electronic Transactions

职业：用于安全和私人密码交易的有效密码协议一个典型的计算机用户每天都要进行大量的电子交易：阅读电子邮件、管理银行账户、在线购物等等。每一项都必须是安全的：只能由授权用户执行，输入的信息必须是真实的。另一方面，每笔交易都应该是私密的：未经用户明确同意，个人信息或账户余额不应泄露。由于数据聚合很容易完成，因此非常希望将每个事务中传输的信息限制在最低限度，同时不损害其真实性。使这成为可能的加密方案是本研究的预期直接结果。该项目研究了用于安全和私人电子交易的系统将包含的基本协议的安全要求，并开发了有效且可证明安全的数字签名方案和其他原语，这些原语有助于设计此类协议。实现这些结果的主要方法是在现有的高度理论基础上使用实用的构建块。由于该项目开发了个人信息不会被滥用的可证明保证，其更广泛的影响是保护计算机用户的隐私。

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.