This book constitutes the refereed proceedings of the 10th International Conference on Practice and Theory in Public-Key Cryptography, PKC 2007, held in Beijing, China in April 2007. The 29 revised full papers presented together with two invited lectures are organized in topical sections on signatures, cryptanalysis, protocols, multivariate cryptosystems, encryption, number theoretic techniques, and public-key infrastructure.

The two-volume set LNCS 10769 and 10770 constitutes the refereed proceedings of the 21st IACR International Conference on the Practice and Theory of Public-Key Cryptography, PKC 2018, held in Rio de Janeiro, Brazil, in March 2018. The 49 revised papers presented were carefully reviewed and selected from 186 submissions. They are organized in topical sections such as Key-Dependent-Message and Selective-Opening Security; Searchable and Fully Homomorphic Encryption; Public-Key Encryption; Encryption with Bad Randomness; Subversion Resistance; Cryptanalysis; Composable Security; Oblivious Transfer; Multiparty Computation; Signatures; Structure-Preserving Signatures; Functional Encryption; Foundations; Obfuscation-Based Cryptographic Constructions; Protocols; Blockchain; Zero-Knowledge; Lattices.

This book constitutes the refereed post-conference proceedings of the 6th European Workshop on Public Key Services, Applications and Infrastructures, EuroPKI 2009, held in Pisa, Italy, in September 2009. The 18 revised full papers presented together with an invited speech were carefully reviewed and selected from 40 submissions. The papers are organized in topical sections on certificate less encryption, certificates and revocation, cryptographic protocols, PKI in practice, encryption and auctions, reputation and user aspects, and digital signatures.

This book constitutes the refereed proceedings of the Cryptographers' Track at the RSA Conference 2008, CT-RSA 2008, held in San Francisco, CA, USA in April 2008. The 26 revised full papers presented together with the abstract of 1 invited talk were carefully reviewed and selected from 95 submissions. The papers are organized in topical sections on hash function cryptanalysis, cryptographic building blocks, fairness in secure computation, message authentication codes, improved aes implementations, public key encryption with special properties, side channel cryptanalysis, cryptography for limited devices, invited talk, key exchange, cryptanalysis, and cryptographic protocols.

This book constitutes the proceedings of the 8th International Conference on Security and Cryptography, SCN 2012, held in Amalfi, Italy, in September 2012. The 31 papers presented in this volume were carefully reviewed and selected from 72 submissions. They are organized in topical sections on cryptography from lattices; signature schemes; encryption schemes; efficient two-party and multi-party computation; security in the UC framework; cryptanalysis; efficient constructions; and protocols and combiners.

This book constitutes the refereed proceedings of the 31st Annual International Cryptology Conference, CRYPTO 2011, held in Santa Barbara, CA, USA in August 2011. The 42 revised full papers presented were carefully reviewed and selected from 230 submissions. The volume also contains the abstract of one invited talk. The papers are organized in topical sections on randomness and its use; computer-assisted cryptographic proofs; outsourcing and delegatin computation; symmetric cryptanalysis and constructions; secure computation: leakage and side channels; quantum cryptography; lattices and knapsacks; public-key encryption; symmetric schemes; signatures; obilvious transfer and secret sharing; and multivariate and coding-based schemes.

This book constitutes the refereed proceedings of the Cryptographers' Track at the RSA Conference 2006, CT-RSA 2006, held in San Jose, CA, USA in February 2006. The book presents 24 papers organized in topical sections on attacks on AES, identification, algebra, integrity, public key encryption, signatures, side-channel attacks, CCA encryption, message authentication, block ciphers, and multi-party computation.

AFRICACRYPT 2009washeld during June 21–25,2009in Gammarth,Tunisia. After AFRICACRYPT 2008 in Casablanca, Morocco,it was the second inter- tional research conference in Africa dedicated to cryptography. The conference received70 submissions;four of these wereidenti?ed as irr- ular submissions. The remaining papers went through a careful doubly ano- mous review process. Every paper received at least three reports; papers with a ProgramCommittee member asco-authorreceived?vereports.After the review period, 25 papers were accepted for presentation. The authors were requested to revisetheirpapersbasedonthecommentsreceived.Theprogramwascompleted with invited talks by Antoine Joux, Ueli Maurer and Nigel Smart. Firstandforemostwe wouldlike to thank the members ofthe ProgramC- mittee for the manyhoursspent onreviewinganddiscussing the papers,thereby producing more than 600 Kb of comments. They did an outstanding job. We wouldalsolike to thank the numerousexternalreviewersfor their assistance.We are also indebted to Shai Halevi for the support provided for his excellent Web- Submission-and-Review software package. We also wish to heartily thank Sami Ghazali, the General Chair, and Sami Omar, the General Co-chair, for their - fortsintheorganizationoftheconference.SpecialthanksgototheTunisianM- istry of CommunicationTechnologies,the National Digital Certi?cationAgency, and the Tunisian Internet Agency for their support of the organization. Finally, we would like to thank the participants, submitters, authors and presenters who all together made AFRICACRYPT 2009 a great success. I hope that the AFRICACRYPT conference tradition has now taken ?rm root and that we will witness a fruitful development of academic research in cryptology in Africa.