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Simple encryption/decryption method packaging, including Encode (), decode (), MD5 ()Publication date: 2004-07-30 author: [Reprint] Source: Package Steeven; /*Purpose: Simple encryption/decryption method packagingAuthor: steeven@kali.com.cnDate: 12/

BASE64 encoding is a commonly used character encoding and is used in many places. The JDK provides easy-to-use Base64encoder and Base64decoder, which makes it easy to complete BASE64-based encoding and decoding. Here are the two small functions I

Data digest algorithm is a very important branch of cryptography algorithm, it can be used to encrypt all the data by extracting fingerprint information to realize data signature, data integrity checking and so on, because of its irreversibility.

Encryption, is a special algorithm to change the original information data, so that unauthorized users even obtained encrypted information, but because of the method of decryption, still can not understand the content of the information. Generally

Basic encryption and decryption problems: Conversion of byte arrays and (hexadecimal) strings, encryption and decryption in hexadecimal format During encryption, encryption algorithms and hash algorithms operate on Byte arrays. These algorithms

MySQL common functions: ABS (x )??????????????????? Returns the BIN (x) of the absolute value of x to the binary value of x (OCT returns octal, HEX returns hexadecimal) CEILING (x )??????????????? Returns the x power FLOOR (x) of the minimum integer

PHP Learning--php Encryption, PHP learning--php encryption There are several types of encryption in PHP: 1. MD5 Encryption String MD5 (string $str [, bool $raw _output = false]) Parameters STR--the original string. Raw_output--If the optional

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

#Lang Racket (define (length items) (if(NULL? items)0 (+ 1(Length (cdr items)))) (Define (element- of-set? x set) (Cond (NULL? Setfalse) ((Equal X (car set) )true) (Else(element- of-set x (cdr set)))) (Define (make-leaf symbol weight)

1 frequently Used optimization strategies1.1 Statements1.1.1 Using the actual column nameWhen we query the SQL statement. Do you feel that using actual column names is faster than using * *? The answer is yes.To prove this, interested friends can