base64 decode with key

Chapter 2: Base64, URLBase64, and base64urlbase64 2.1 Basic algorithm rules: Public encryption algorithms The encrypted key is not public. The features of Base64 algorithm disclosure and Key Disclosure do not comply with basic algorithm rules,

Statement: This article is intended for technical exchanges and is not intended for the "square" (the new version of the square educational administration system password processing method has also changed, just use this as an introduction ......)!

1. The origin of Base64Base64 was first used to troubleshoot e-mail transmission issues. Because of "historical issues," earlier e-mail gateways allow only ASCII (binary 00000000-01111111) characters to be transmitted, and if non-ASCII characters

One:. Base64 Supplement"' OBJC1.base64 Simple ExplanationDescription: Base64 can be a cornerstone of cryptography and is very important.Features: Arbitrary binary data can be BASE64 encodedResult: All data can be encoded as a text file that can be

One, base64 picture codecBasic flow: Download a picture from the network. Then base64 encoding, and then base64 decoding, stored in the local e-packing folder.　　

One, base64 picture codecBasic process: Download a picture from the network, then Base64 encoding, and then base64 decoding, stored in the local e-packing directory.　　

For security reasons, we typically choose an encryption method to encrypt text that requires security, while BASE64 encryption and DES64 encryption are common cryptographic algorithms. I remember what I used in the previous project was the

From Http://hi.baidu.com/studyphp Function authcode ($ string, $ operation, $ key = ''){ # String is the string to be encrypted or decrypted # Decryption during Operation decode $ Key = MD5 ($ key? $ Key: $ globals ['discuz _ auth_key ']);$

Here is a string 123456 for example, its MD5 ciphertext value is: e10adc3949ba59abbe56e057f20f883eHere, 1.txt is the file that needs to be encrypted.First, the method of encrypting strings and files with Oppnssl MD5.1. Oppnssl MD5 method of

One, des encryption and decryption Package com.itjh.javaUtil; Import java.io.UnsupportedEncodingException; Import java.security.InvalidKeyException; Import java.security.NoSuchAlgorithmException; Import Java.security.SecureRandom; Import