sha1 insecure

From: Http://hi.baidu.com/zhy65991/blog/item/0a663172b039321a8601b0e4.html Usually, the encryption algorithm used is relatively simple and efficient, the key is short, encryption and decryption speed, deciphering extremely difficult. This paper

Source author Wang HuiChapter 4 Basic Knowledge 1.1. Single-key password systemThe single-key cryptography system is a traditional encryption algorithm, which means that the sender and receiver of the information use the same key for encryption and

PHP learning-PHP encryption, PHP learning-PHP Encryption There are several encryption methods in PHP:1. MD5 Encryption String md5 (string $ str [, bool $ raw_output = false]) Parameters Str -- the original string. Raw_output -- if the optional

Http://blog.csdn.net/jiyanfeng1/article/details/8173733 From: http://blog.csdn.net/laotse/article/details/5910378 First, three concepts: 1. irreversible encryption 2. reversible symmetric encryption 3. reversible asymmetric encryption 1.

First set in Web. config Authentication Mode = "forms"> set mode = "forms" Protection = "All "> encryption and Protection in this example, users are allowed and denied. reject? Represents anonymity * represents everyone allowWhen compared

This article mainly introduces several PHP encryption methods, which are very comprehensive and practical. they are often used in projects. if you need them, you can refer to the following PHP encryption methods: 1. MD5 encryption String md5

This article mainly introduces several PHP encryption methods, which are very comprehensive and practical. they are often used in projects. if you need them, you can refer to the following PHP encryption methods: 1. MD5 encryption String md5

Several methods to implement encryption in PHP are introduced. Several methods for implementing encryption in PHP this article mainly introduces several methods for implementing encryption in PHP, which are very comprehensive and practical and are

Symmetric encryption tool, understanding the principle of symmetric encryption is very simple, the principle section is shown below. OpenSSL enc-ciphername [-in filename] [-out filename] [-pass arg] [-e] [-d] [-a/-base64] [-k password] [-S SALT]

Objective:In the early days of the Internet, the number of hosts connected to the Internet was small and applications were few, so the network protocols that were designed early in the morning did not take into account the concept of network