OpenSSL

Ansible Solution for Bulk Upgrading OpenSSH and OpenSSL

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Ansible Solution for Bulk Upgrading OpenSSH and OpenSSL

Complete Ansible Playbook (<span>upgrade_openssh_openssl.yml</span>) yaml —- name: Upgrade OpenSSH and OpenSSL to fix vulnerabilities hosts: all become: yes serial: 1 # Operate on one host at a time to reduce risk vars: # Target versions (modify according to actual needs) target_openssh_version: "8.9p1" target_openssl_version: "3.0.11" # Fallback versions (for emergency recovery) fallback_openssh_version: "8.4p1" fallback_openssl_version: "1.1.1w" tasks: … Read more

The First Domestic Yocto Project Book: Efficiently Customizing Embedded Linux Systems and Easily Deploying Qt Applications

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The First Domestic Yocto Project Book: Efficiently Customizing Embedded Linux Systems and Easily Deploying Qt Applications

01 Modular Build System: The Yocto Project uses the BitBake build tool, allowing developers to easily add, remove, or modify packages, including Qt SDK and OpenSSL. Flexibility and Customizability: Developers can highly customize the system according to project requirements, supporting various hardware architectures and operating system configurations, ensuring that components like Qt and OpenSSL are … Read more

Summary of Vulnerabilities in HTTP/HTTPS Protocols: How to Check and Prevent Them

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Summary of Vulnerabilities in HTTP/HTTPS Protocols: How to Check and Prevent Them

The following is a classification and organization of vulnerabilities in the HTTP/HTTPS protocols based on the perspectives of black box testing、white box testing and gray box testing: 1. Black Box Testing (External Perspective, No Internal Access) Definition: Simulates the attacker’s perspective, testing only through external network interfaces without relying on internal system code or configuration … Read more

Avoiding Pitfalls: A Guide for C Programmers

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Avoiding Pitfalls: A Guide for C Programmers

In 2014, the open-source library OpenSSL, which supports secure transport layer protocols, revealed a shocking vulnerability in its TLS/DTLS Heartbeat extension, which contained a buffer overflow vulnerability. This is the infamous Heartbleed vulnerability. This vulnerability allowed attackers to obtain encrypted data and steal the keys used for encryption. Since OpenSSL is one of the foundational … Read more

Application of National Encryption Algorithms in Various Platforms

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Application of National Encryption Algorithms in Various Platforms

National encryption refers to the domestic encryption algorithms recognized by the National Cryptography Administration. The main algorithms include SM1, SM2, SM3, SM4, and the latest SM9. These algorithms are primarily used in domestic environments as recognized by the National Cryptography Administration. SM2 Algorithm: The SM2 elliptic curve public key cryptography algorithm is a public key … Read more

Applications of C++ in Encryption and Decryption

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Applications of C++ in Encryption and Decryption

What Are Encryption and Decryption? Why Do We Need Them? How Does C++ Play a Role? In today’s information age, data security has become a core issue of concern across various industries. Encryption and decryption technologies, as crucial means of protecting data privacy, are ubiquitous. Whether in online payments, social media, or internal corporate communications, … Read more

Security Testing and Evaluation of C++ in Network Research

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Security Testing and Evaluation of C++ in Network Research

C++ in Network Research: A Comprehensive Analysis of Security Testing and Evaluation 1. The Close Connection Between C++ and Network Research In today’s digital wave, the internet has permeated every corner of life, from daily social entertainment and convenient shopping to efficient corporate operations and cutting-edge scientific research. Behind the booming development of internet technology, … Read more

Understanding Cryptographic Algorithms: ECC vs RSA

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Understanding Cryptographic Algorithms: ECC vs RSA

1. Background According to records, the ancient Greeks invented substitution ciphers around 400 BC. The world’s first telephone secrecy patent appeared in 1881. During World War II, the German military used the “Enigma” cipher machine, and cryptography played a very important role in the war. With the development of information and digital society, people’s awareness … Read more

Exploring Poco Util Net SSL Cipher Factory Manager in C++

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Exploring Poco Util Net SSL Cipher Factory Manager in C++

# Exploring C++ Network Encryption Tool: poco-util-netsslcipherfactorymanagerfactorymanagerfactory Hello everyone, I am your C++ learning buddy! Today we are going to explore a super long C++ library: poco-util-netsslcipherfactorymanagerfactorymanagerfactory. Don't be intimidated by the name, it is actually a very powerful network SSL encryption tool. Through today's learning, you will understand the basic concepts, main functions, and … Read more

MQTT: The Nervous System of the IoT

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MQTT: The Nervous System of the IoT

Let’s delve into MQTT, how to ensure its security, and examples of the protocol to see how it has rapidly gained popularity in the field of the Internet of Things. In today’s world, there are billions of smart devices. Imagine if these devices were all interconnected and could communicate with each other just like their … Read more