This book constitutes the refereed proceedings of the 4th International Workshop on Practice and Theory in Public Key Cryptography, PKC 2001, held in Cheju Island, Korea in February 2001.
The 30 revised full papers presented were carefully reviewed and selected from 67 submissions.

On the Security o a Williams Based Public Key Encryption Scheme.- Semantically Secure McEliece Public-Key Cryptosystems -Conversions for McEliece PKC -.- IND-CCA Public Key Schemes Equivalent to Factoring n =pq.- Identification, Signature and Signcryption Using High Order Residues Modulo an RSA Composite.- On the Security o Lenstra’ s Variant o DSA without Long Inversions.- Fast Irreducibility and Subgroup Membership Testing in XTR.- A New Aspect for Security Notions: Secure Randomness in Public-Key Encryption Schemes.- The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes.- A Generalisation, a Simpli.cation and Some Applications of Paillier's Probabilistic Public-Key System.- Marking: A Privacy Protecting Approach Against Blackmailing.- Cryptanalysis of Two Sparse Polynomial Based Public Key Cryptosystems.- Cryptanalysis of PKP: A New Approach.- Cryptanalysis of a Digital Signature Scheme on ID-Based Key-Sharing Infrastructures.- Loopholes in Two Public Key Cryptosystems Using the Modular Group.- Efficient Revocation in Group Signatures.- A Public-Key Traitor Tracing Scheme with Revocation Using Dynamic Shares.- Efficient Asymmetric Self-Enforcement Scheme with Public Traceability.- Adaptive Security for the Additive-Sharing Based Proactive RSA.- Robust Forward-Secure Signature Schemes with Proactive Security.- Equitability in Retroactive Data Confiscation versus Proactive Key Escrow.- A PVSS as Hard as Discrete Log and Shareholder Separability.- One Round Threshold Discrete-Log Key Generation without Private Channels.- Remarks on Mix-Network Based on Permutation Networks.- New Key Recovery in WAKE Protocol.- Redundant Representation of Finite Fields.- Compact Encoding of Non-adjacent Forms with Applications to Elliptic CurveCryptography.- Efficient Implementation of Elliptic Curve Cryptosystems on the TI MSP430x33x Family of Microcontrollers.- Secure Server-Aided Signature Generation.- Efficient Long-Term Validation of Digital Signatures.- A Novel Systolic Architecture for an Efficient RSA Implementation.

GPSR Compliance The European Union's (EU) General Product Safety Regulation (GPSR) is a set of rules that requires consumer products to be safe and our obligations to ensure this. If you have any concerns about our products you can contact us on ProductSafety@springernature.com. In case Publisher is established outside the EU, the EU authorized representative is: Springer Nature Customer Service Center GmbH Europaplatz 3 69115 Heidelberg, Germany ProductSafety@springernature.com