C中Aspnet环境下字符串加密解密操作有哪些疑问和难点

Aspnet和C#加密解密字符串的使用详解

在ASP.NET开发过程中，数据的安全性和隐私保护至关重要，加密解密技术是实现数据安全的有效手段之一，本文将详细介绍在ASP.NET中使用C#进行字符串加密解密的方法，包括常用的加密算法和实现步骤。

加密算法简介

在C#中，常用的加密算法有DES、AES、RSA等，以下是这些算法的简要介绍：

DES加密解密

引入命名空间

using System;using System.Security.Cryptography;using System.Text;

加密方法

public static string EncryptDES(string str, string key){byte[] inputBytes = Encoding.UTF8.GetBytes(str);byte[] keyBytes = Encoding.UTF8.GetBytes(key);DESCryptoServiceProvider provider = new DESCryptoServiceProvider();provider.Key = keyBytes;provider.IV = keyBytes;ICryptoTraNSForm encryptor = provider.createEncryptor();byte[] outputBytes = encryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);return Convert.ToBase64String(outputBytes);}

解密方法

public static string DecryptDES(string encryptedStr, string key){byte[] inputBytes = Convert.FromBase64String(encryptedStr);byte[] keyBytes = Encoding.UTF8.GetBytes(key);DESCryptoServiceProvider provider = new DESCryptoServiceProvider();provider.Key = keyBytes;provider.IV = keyBytes;ICryptoTransform decryptor = provider.CreateDecryptor();byte[] outputBytes = decryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);return Encoding.UTF8.GetString(outputBytes);}

AES加密解密

引入命名空间

using System;using System.Security.Cryptography;using System.Text;

加密方法

public static string EncryptAES(string str, string key){byte[] inputBytes = Encoding.UTF8.GetBytes(str);byte[] keyBytes = Encoding.UTF8.GetBytes(key);RijndaelManaged provider = new RijndaelManaged();provider.Key = keyBytes;provider.IV = keyBytes;ICryptoTransform encryptor = provider.CreateEncryptor();byte[] outputBytes = encryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);return Convert.ToBase64String(outputBytes);}

解密方法

public static string DecryptAES(string encryptedStr, string key){byte[] inputBytes = Convert.FromBase64String(encryptedStr);byte[] keyBytes = Encoding.UTF8.GetBytes(key);RijndaelManaged provider = new RijndaelManaged();provider.Key = keyBytes;provider.IV = keyBytes;ICryptoTransform decryptor = provider.CreateDecryptor();byte[] outputBytes = decryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);return Encoding.UTF8.GetString(outputBytes);}

RSA加密解密

引入命名空间

using System;using System.Security.Cryptography;using System.Text;

加密方法

public static string EncryptRSA(string str, string publicKey){byte[] inputBytes = Encoding.UTF8.GetBytes(str);byte[] outputBytes = RSAEncryption(inputBytes, publicKey);return Convert.ToBase64String(outputBytes);}private static byte[] RSAEncryption(byte[] inputBytes, string publicKey){using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider()){rsa.FromXmlString(publicKey);return rsa.Encrypt(inputBytes, false);}}

解密方法

public static string DecryptRSA(string encryptedStr, string privateKey){byte[] inputBytes = Convert.FromBase64String(encryptedStr);byte[] outputBytes = RSADecryption(inputBytes, privateKey);return Encoding.UTF8.GetString(outputBytes);}private static byte[] RSADecryption(byte[] inputBytes, string privateKey){using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider()){rsa.FromXmlString(privateKey);return rsa.Decrypt(inputBytes, false);}}

本文详细介绍了在ASP.NET中使用C#进行字符串加密解密的方法，包括DES、AES和RSA三种加密算法，在实际开发过程中，可以根据需求选择合适的加密算法，确保数据的安全性和隐私保护。

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();string publicKey = rsa.ToXmlString(false);string privateKey = rsa.ToXmlString(true);

代码将生成RSA公钥和私钥,并分别存储在和 privateKey 变量中。

asp.net如何进行MD5加密啊

<%@ Page Language=C# ContentType=text/html%><%@ Import Namespace=System%>

SHA1加密

sql中的视图加密之后怎么样才可以解密呢？

这个没法解密，因为这是一个不可逆的过程，和你删除数据一样，在sql里面删除数据是不可以再恢复的了！唯一的方法就是在把视图建一遍，注意:不要在加密了！

跪求c语言编程问题 文件移位加密与解密 急！

这样就可以了 #include void code(char *p,int key) {while(*p!=\0){*p=97+(*p-97+key)%26;p++;} } void uncode(char *p,int key) {while(*p!=\0){*p=97+(*p-71-key)%26;p++;} } main() {char str[100];int n,key;printf(输入密匙：);scanf(%d,&key);printf(输入1加密，输入2解密:);scanf(%d,&n);printf(输入字符串:);scanf(%s,str);if(n==1){code(str,key);printf(密文为%s\n,str);}else if(n==2){uncode(str,key);printf(原文为%s\n,str);} }