Overview

Ed25519 is a high-performance digital signature algorithm using the Edwards curve Curve25519. It provides 128-bit security with 64-byte signatures and 32-byte keys, offering significant advantages over RSA and ECDSA including deterministic signatures (no random nonce needed), resistance to side-channel attacks, and fast verification. This skill covers implementing Ed25519 for document signing, code signing, and API authentication.

When to Use

When deploying or configuring implementing digital signatures with ed25519 capabilities in your environment
When establishing security controls aligned to compliance requirements
When building or improving security architecture for this domain
When conducting security assessments that require this implementation

Prerequisites

Familiarity with cryptography concepts and tools
Access to a test or lab environment for safe execution
Python 3.8+ with required dependencies installed
Appropriate authorization for any testing activities

Overview

When to Use

When deploying or configuring implementing digital signatures with ed25519 capabilities in your environment
When establishing security controls aligned to compliance requirements
When building or improving security architecture for this domain
When conducting security assessments that require this implementation

Prerequisites

Familiarity with cryptography concepts and tools
Access to a test or lab environment for safe execution
Python 3.8+ with required dependencies installed
Appropriate authorization for any testing activities

Property	Ed25519	RSA-3072	ECDSA P-256
Security	128-bit	128-bit	128-bit
Public key size	32 bytes	384 bytes	64 bytes
Signature size	64 bytes	384 bytes	64 bytes
Key generation	~50 us	~100 ms	~1 ms
Sign	~70 us	~5 ms	~200 us
Verify	~200 us	~200 us	~500 us
Deterministic	Yes	No (PSS)	No (unless RFC 6979)

Implementing Digital Signatures With Ed25519

Overview

When to Use

Prerequisites

Implementing Digital Signatures With Ed25519

Overview

When to Use

Prerequisites

Objectives

Key Concepts

Ed25519 vs RSA vs ECDSA

Key Properties

Security Considerations

Validation Criteria

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