Digital Signatures Explained With a Hands-On OpenSSL Lab
Summary
A tutorial explains how digital signatures use hashing and public-key cryptography to support integrity and authenticity, then demonstrates key generation, signing, verification, and tampering detection in a Docker lab with OpenSSL.
Key points
- The tutorial describes using a hash and a private key to create a digital signature, which recipients can verify with the corresponding public key.
- Its Docker lab uses OpenSSL to generate a 2048-bit RSA key pair, sign a message with SHA-256, and verify the signature.
- Changing the signed message causes verification to fail, demonstrating tampering detection.
- The article identifies software updates, code signing, secure email, and TLS certificates as uses of digital signatures.
Article Details
- Topic
- Digital signatures, including integrity and authenticity verification, with a hands-on Docker lab using OpenSSL.