ciphers continued--Vegerne Cipher and its application in php
> 2.Vegerne Cipher- The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution. The Vigenère cipher has been reinvented many times. lets look at the image for vegerne ciphers logic now i will make a function for encription by logic of vegerne cipher function vegerne_cipher($str,$str_passwd) { if(preg_match("/[^a-zA-Z]/", $str_passwd)) { return null; } else { $str_password=strtolower($str_passwd); $pass_arr=array(); $pass_arr_num=array(); $alpha=array('a'=>'1','b'=>'2','c'=>'3','d'=>'4','e'=>'5','f'=>'6','g'=>'7','h'=>'8','i'=>'9','j'=>'10','k'=>'11','l'=>'12','m'=...