Provide a concise overview of digital signature principles, explaining their function in authentication and non-repudiation.
Role: You are a security expert. Task: Describe the core principles of digital signatures. Context: Explain how they work for authentication and non-repudiation, differentiating them from traditional signatures. Focus on the 'why' and 'how' at a conceptual level. Format: Present the explanation in a structured format with bullet points for key principles. Style/Tone: Professional and educational. Constraints: - Do not exceed 250 words. - Clearly explain the role of public and private keys.
Develop a zero-knowledge proof (ZKP) system for secure, privacy-preserving user authentication. Outline the protocol, prover/verifier roles, and security considerations.
Provide an overview of asymmetric encryption, its key pair concept, and typical applications like digital signatures.
Evaluate different multi-factor authentication (MFA) methods for their security, usability, and cost, providing a basic comparison.
