Privacy-Preserving Speaker Authentication.- Differential Attacks on Reduced RIPEMD-160.- Revisiting Difficulty Notions for Client Puzzles and DoS Resilience.- On Optimal Bounds of Small Inverse Problems and Approximate GCD Problems with Higher Degree.- Strong Authentication with Mobile Phone.- Measuring SSL Indicators on Mobile Browsers: Extended Life, or End of the Road.- Domain-Specific Pseudonymous Signatures for the German Identity Card.- Solutions for the Storage Problem of McEliece Public and Private Keys on Memory-Constrained Platforms.- 100% Connectivity for Location Aware Code Based KPD in Clustered WSN: Merging Blocks.- Learning Fine-Grained Structured Input for Memory Corruption Detection.- Dynamic Anomaly Detection for More Trustworthy Outsourced Computation.- An Empirical Study of Dangerous Behaviors in Firefox Extensions.- Collaboration-Preserving Authenticated Encryption for Operational Transformation Systems.- Selective Document Retrieval from EncryptedDatabase.- Additively Homomorphic Encryption with a Double Decryption Mechanism, Revisited.- Secure Hierarchical Identity-Based Identification without Random Oracles.- Efficient Two-Move Blind Signatures in the Common Reference String Model.- Compliance Checking for Usage-Constrained Credentials in Trust Negotiation Systems.- A Quantitative Approach for Inexact Enforcement of Security Policies.- OSDM: An Organizational Supervised Delegation Model for RBAC.- GPU-Acceleration of Block Ciphers in the OpenSSL Cryptographic Library.- A Highly-Efficient Memory-Compression Approach for GPU-Accelerated Virus Signature Matching.- Intended Actions: Risk Is Conflicting Incentives.- On the Self-similarity Nature of the Revocation Data. Differential Attacks on Reduced RIPEMD-160.- Revisiting Difficulty Notions for Client Puzzles and DoS Resilience.- On Optimal Bounds of Small Inverse Problems and Approximate GCD Problems with Higher Degree.- Strong Authentication with Mobile Phone.- Measuring SSL Indicators on Mobile Browsers: Extended Life, or End of the Road.- Domain-Specific Pseudonymous Signatures for the German Identity Card.- Solutions for the Storage Problem of McEliece Public and Private Keys on Memory-Constrained Platforms.- 100% Connectivity for Location Aware Code Based KPD in Clustered WSN: Merging Blocks.- Learning Fine-Grained Structured Input for Memory Corruption Detection.- Dynamic Anomaly Detection for More Trustworthy Outsourced Computation.- An Empirical Study of Dangerous Behaviors in Firefox Extensions.- Collaboration-Preserving Authenticated Encryption for Operational Transformation Systems.- Selective Document Retrieval from Encrypted Database.- Additively Homomorphic Encryption with a Double Decryption Mechanism, Revisited.- Secure Hierarchical Identity-Based Identification without Random Oracles.- Efficient Two-Move Blind Signatures in the Common Reference String Model.- Compliance Checking for Usage-Constrained Credentials in Trust NegotiationSystems.- A Quantitative Approach for Inexact Enforcement of Security Policies.- OSDM: An Organizational Supervised Delegation Model for RBAC.- GPU-Acceleration of Block Ciphers in the OpenSSL Cryptographic Library.- A Highly-Efficient Memory-Compression Approach for GPU-Accelerated Virus Signature Matching.- Intended Actions: Risk Is Conflicting Incentives.- On the Self-similarity Nature of the Revocation Data. 

This book constitutes the refereed proceedings of the 15th International Conference on Information Security, ISC 2015, held in Passau, Germany, in September 2012. The 23 revised full papers presented together with one invited paper were carefully reviewed and selected from 72 submissions. The papers are organized in topical sections on cryptography and cryptanalysis, mobility, cards and sensors, software security, processing encrypted data, authentication and identification, new directions in access control, GPU for security, and models for risk and revocation.