php Programming Glossary: reversible

http://stackoverflow.com/questions/10916284/how-to-encrypt-decrypt-data-in-php

enc_name MCRYPT_MODE_CFB iv Hashing Storing a reversible password in your database must be avoided as much as possible..

Algorithm to get all possible string combinations from array up to certain length

http://stackoverflow.com/questions/12293870/algorithm-to-get-all-possible-string-combinations-from-array-up-to-certain-lengt

q p 0. Also note that the conversion is naturally reversible. Given a number 6666 in base 6 the decimal value is 6 6^3 6..

Best way to encode passwords in PHP

http://stackoverflow.com/questions/1391613/best-way-to-encode-passwords-in-php

the sake of your users do not store their passwords in any reversible format It doesn't matter if it's Base64 encoded or triple DES.. Base64 encoded or triple DES 168 bit encryption if it is reversible it is exactly as secure as if you didn't encode it at all ...

PHP short unique ID generation using auto_increment?

http://stackoverflow.com/questions/1650185/php-short-unique-id-generation-using-auto-increment

function this is a function that does a one to one reversible mapping of one integer your sequential counter to another. Some..

PHP:How to send the original password to the user when he clicks forgot password which is encrypted by using md5?

http://stackoverflow.com/questions/2780198/phphow-to-send-the-original-password-to-the-user-when-he-clicks-forgot-password

The two are not the same encryption is designed to be reversible hence the complementary term decryption whereas hashing is designed..

How to compress/decompress a long query string in PHP?

http://stackoverflow.com/questions/2996049/how-to-compress-decompress-a-long-query-string-in-php

md5 is unsuitable since md5 is a hash which means it's non reversible. You can't get the original value back from it. I'm afraid you..

Algorithm for generating a random number

http://stackoverflow.com/questions/319524/algorithm-for-generating-a-random-number

have the same number of bits and that the the algorithm is reversible bijection . Thanks to Adam Liss CesarB for exapanding on the..

Code Challenge - Convert var_dump of array back to array variable

http://stackoverflow.com/questions/3531857/code-challenge-convert-var-dump-of-array-back-to-array-variable

syntax and serialize will render a non human readable but reversible array to string conversion... Edit Alright for the challenge..

PHP 2-way encryption: I need to store passwords that can be retrieved

http://stackoverflow.com/questions/5089841/php-2-way-encryption-i-need-to-store-passwords-that-can-be-retrieved

eventually crack the encryption no encryption is 100 un reversible without the key As @NullUserException points out this is not..

How to generate Unique Order Id (just to show touser) with actual Order Id?

http://stackoverflow.com/questions/5387755/how-to-generate-unique-order-id-just-to-show-touser-with-actual-order-id

this question If your requirements are It must be reversible i.e. given just the random ID you can find the original order_id..

Perfect Hash Function for Human Readable Order Codes

http://stackoverflow.com/questions/9551091/perfect-hash-function-for-human-readable-order-codes

of independent steps the overall function is bijective reversible if and only if every single one of those steps is. Do you see.. y ^ y x ^ 0 x so clearly XOR ing with a constant value is reversible by re XOR ing with the same value so all we have to show is.. symmetric and while key key ^ key NUM_BITS is completely reversible key key ^ key NUM_BITS is not. Above when I wrote that the two..

How to design a sequential hash-like function

http://stackoverflow.com/questions/9804100/how-to-design-a-sequential-hash-like-function

if it's obvious but this hash like function needs to be reversible because when the user requests ueGR the server needs to know.. The rest are optional. All of these manipulations are reversible and guarantee that each output is going to be unique . When..