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ASAtharva Sen Baraiblog.rookduel.techMay 19 · 14 min read

Building RookDuel Avikal: From Chess Steganography to Post-Quantum Archival Security

Avikal did not begin as an archival security tool. It began with a question: can data be hidden inside chess? Today, RookDuel Avikal is an open-source archival security system built around the .avk fo

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Nninecertpulse.hashnode.devApr 26 · 12 min read

SSL Certificate Checker: How to Verify TLS Config Like an SRE

An ssl certificate checker answers one question: will this cert work for the clients you care about, right now, and for how much longer. Most checkers stop at "chain looks fine, padlock is green" and miss the half-dozen ways a certificate can be tech...

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JJebitoksharonjebitok.comJan 28 · 31 min read

b3dr0ck - NGINX, Certificate-based Authentication & OpenSSL (TryHackMe)

The b3dr0ck challenge takes us to Bedrock, where Barney Rubble is setting up the ABC (Abbadabba Broadcasting Company) webserver and struggling with TLS certificate configuration. This beginner-to-intermediate level challenge focuses on certificate-ba...

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SKShubham Kumarchmodshubham.hashnode.devNov 6, 2025 · 7 min read

How LibOQS Uses Valgrind to Hunt for Constant-Time Leaks?

In cryptography, ensuring constant-time execution is a critical defense against timing side-channel attacks. An implementation is considered constant-time if its execution time and memory access patterns are independent of secret-valued inputs. Failu...

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HBHector Bejaranocommunity.acceleratek.comOct 3, 2025 · 3 min read

Creando un certificado digital utilizando un algoritmo de encriptación post-cuántica

Es posible crear un certificado digital que implemente algoritmos PQC (Post-Quantum Crypto). Vamos a demostrar como es posible generar un par de llaves ML-DSA y utilizarlas dentro de un certificado X.509, ya sea self-signed o firmado por un CA privad...

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HHongtech.mrleong.netSep 26, 2025 · 6 min read

Cheatsheet & Examples: openssl

openssl is a versatile tool for managing cryptographic operations, including generating keys, creating certificates, and securing communications. It supports SSL/TLS protocols, digital signatures, encryption, and more. Generate a Self-Signed Certific...

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MAMuskan Agrawalmuskanagrawal.hashnode.devSep 7, 2025 · 2 min read

Sadservers Day6: Renewing SSL certificates

Problem Statement Today’s challenge involved an expired SSL certificate on an Nginx server serving a “Hello, World!” page over HTTPS. The goal: generate a new certificate with identical issuer and subject details, ensuring seamless security and confi...

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SBSeun Bdevblog.seunb.comJul 2, 2025 · 3 min read

A Simple Foundation for Data Security: Public-Key Encryption with OpenSSL

In today’s world, keeping data safe is more important than ever. Public-key encryption is one of the basic building blocks for data security. It lets two people share secret messages over an open network without ever sharing a password. We’ll work in...

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RSRAkshiT ShaHbeingcoders.hashnode.devMay 2, 2025 · 4 min read

How to Convert PFX to CRT and KEY Files with OpenSSL

Learn how to convert PFX files to .CRT and .KEY formats using OpenSSL in this easy guide. TL;DR — This 7-minute guide will help you convert your .pfx file into a .crt or .key file from the encrypted key using OpenSSL Commands for free. I kept 3 minu...

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SSSaurabh Singh Gautamsoftwareengineerpov.hashnode.devMar 21, 2025 · 5 min read

Build and Integrate libraries having different build process seamlessly into CMake

Heavy title, right? Then before setting the context for this article, I will break down the title first. And we will start with CMake. What is CMake? As you know, for a compiled language, we need compilers to compile them into machine code which then...

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#openssl

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Trending tags this week

Building RookDuel Avikal: From Chess Steganography to Post-Quantum Archival Security

SSL Certificate Checker: How to Verify TLS Config Like an SRE

b3dr0ck - NGINX, Certificate-based Authentication & OpenSSL (TryHackMe)

How LibOQS Uses Valgrind to Hunt for Constant-Time Leaks?

Creando un certificado digital utilizando un algoritmo de encriptación post-cuántica

Cheatsheet & Examples: openssl

Sadservers Day6: Renewing SSL certificates

A Simple Foundation for Data Security: Public-Key Encryption with OpenSSL

How to Convert PFX to CRT and KEY Files with OpenSSL

Build and Integrate libraries having different build process seamlessly into CMake