Modern cryptography has evolved dramatically since the 1970s. With the rise of new network architectures and services, the field encompasses much more than traditional communication where each side is of a single user. It also covers emerging communication where at least one side is of multiple users. New Directions of Modern Cryptography presents
Introduction. Trust Problem. Ciphertext Access Control Problem. Efficiency Problems in Multi-Message Cryptology. The Challenges from Quantum and Biological Computing. Organization. Proxy Re-Cryptography. Introduction. Proxy Re-Signature. Proxy Re-Encryption. Attribute-Based Cryptography. Universal Definitions. Bounded Ciphertext-Policy Encryption Schemes. Multi-Authority Encryption Schemes. Interval Encryption Schemes. Fuzzy Identity-Based Signature Schemes. Batch Cryptography. Aggregate Signature and Batch Verification. Batch Decryption and Batch Key Agreement. Batch RSA's Implementation Based on Diophantine Equations. Solving the Diophantine Equations. Noncommutative Cryptography. Braid-Based Cryptography. Z-Modular Method. Using Monomials in Z-Modular Method. Improved Key Exchange over Thompson's Group. Perspectives. Appendices. Appendix A. Appendix B. Appendix C.