Encryption

[Anon]

Does Any One know of or have any Strong, +256 bit, Encryption Modules written in PHP3/4? Any Pointers Or Good Mods Will Do.

Thanx Dave S.

[trooper]

there are a few encryption types that can be used (although i'm not sure they are 256 bit)
1) md5 - this is a one way operation (you can't un encrypt) to use simply put md5($varibale to be encrypted)

2)password - this is often used to encrypt a passowrd - once again not sure f the strength.
to use simpy put password($variable to be encrypted).

3)this is probably your best bet
mycrypt. - There are several different uses of this so look it up on php.net or some other php sites.
http://www.php.net/manual/en/function.mcrypt-encrypt.php

[Anon]

1) md5 - this is a one way operation (you
can't un encrypt) to use simply put md
($varibale to be encrypted)

I know this sounds like a stupid question, but why would you want to encrypt something and not be able to "un encrypt" it later?

Just thought I might ask out of curiousity.

[Anon]

one way encryption(aka hashing) is done most times for password storage, so rather than storing the password as plaintext you store the hash. If you wanted to store your passwords in a database or file encrypted(as opposed to hashed) your code would need to contain the password used to encrypt the password for you to verify that the user input the correct password, storing the hash eliminates this need and therefore is much safer.

[viper1777]

If you cannot decipher the text then no on else can, Yes? You can use it for passwords you encrypt the one the user enters on registration, and when they try to login you encrypt the password entered now and compair the two ciphertexts.