A quick, easy yet comprehensive GPG tutorial

Posted on July 28, 2022November 14, 2024 by Marco Antonio Carcano

GnuPG is a freely available command line encryption suite based on OpenPGP encryption library, and it is probably the most used encryption suite in the world. Every IT professional sooner or later face use cases that require to know how to handle it, but the point is that, despite a trivial usage of this suite may look quite easy, there are some not so obvious nuances that if known can really improve the experience, also saving from making some hidden mistakes that can really painful if anything would go wrong.

This is a quick, easy yet comprehensive GPG tutorial with the aim to provide a quick yet thorough explanation of how to safely use this amazing encryption suite.

Cryptography quick guide – understand symmetric and asymmetric cryptography and how to use it with OpenSSL

Posted on May 20, 2021November 14, 2024 by Marco Antonio Carcano

When it comes to guarantee data confidentiality on the wire or on the disk we cannot be exempt to know how to use cryptography: this post provides a quick guide of both symmetric and asymmetric cryptography along with an overview of their bricks: RSA and DSA keys, Elliptic Curves keys, PGP Keys, Message Digest, HMAC, digital signature and encipherment. The aim is to provide the necessary terms and concepts to understand how to operate with cryptographic tools, providing examples with openssl.