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preface Today, let's learn about command execution in Java. Command execution is still widely used in the field of security. You have to understand and study it. If you forget some knowledge points used below, you can go to the previous article JAVA RMI learning notes *** About exec The Runtime class, as its name implies, is the Runtime ...

catalogue Low Medium High Impossible Brute force cracking: an attack that attempts to obtain a user's password by using a large number of guesses and exhaustive methods. Just guess the password. The attacker keeps enumerating requests. By comparing the length of the data packet, you can well judge whether the blasting is successful or not ...

2021SC@SDUSC 4 hash table man lhash 4.1 hash table In general data structures such as linear tables and trees, there is no definite relationship between the relative position of records in the structure and the keywords of records, A series of keyword comparisons are needed to find records in the structure This kind of search method is based ...

Sign in F12 with register.php import requests import re url1 = "http://7fc1279d-6a4b-4fca-968f-235322686f5b.challenge.ctf.show/register.php" url2 = "http://7fc1279d-6a4b-4fca-968f-235322686f5b.challenge.ctf.show/login.php" flag = '' for i in range(1, 50): payload = "hex(hex(substr((select/**/flag/**/from/**/flag)from/**/" + str(i) + "/** ...

Understanding the front-end language can help us better understand and tap the front-end vulnerabilities. In the process of social work, we can also use the front-end technology to build puddle attacks or fishing attacks. The design idea of front-end page usually divides the page into three levels: structure layer (HTML), presentation laye ...

1. Authentication and Authorization of Rights Management Privilege management includes two parts: user identity authentication and authorization, referred to as authentication authorization. Users of resources requiring access control are first authenticated, after which they have access to the resource. 1.1 What is authentication Identity ...

Phar What is Phar PHp ARchive, like a Java JAR, but for PHP. Phar (PHp ARchive) is a packaged file similar to JAR. PHP ≥ 5.3 supports phar suffix files by default. You can use it without any other installation. The phar extension provides a way to put an entire PHP application into a. Phar file for easy movement and installation The bigge ...

Programming language producer consumer model and simple implementation of Golang Introduction: This paper introduces the producer consumer model and the demo of the simple implementation of go. 1, Producer consumer Model Producer consumer model: a module (function, etc.) is responsible for generating data, which is processed by another modul ...

Programming language Python Jieba Thesaurus jieba database is an excellent third-party database for Chinese word segmentation. Chinese text needs to obtain a single word through word segmentation jieba library installation Run the cmd window as an administrator and enter the command: pip install jieba jieba library function introductio ...

1 Introduction to AES algorithm Original link: https://blog.csdn.net/mao834099514/article/details/54945776 1.1 introduction to AES algorithm Advanced Encryption Standard (AES) in cryptography, also known as Rijndael encryption method, is a block encryption standard adopted by the federal government of the United States. This standard is ...