Mulley, Nikhil wrote:
Hi Rens,
Can you please be more specific or can you show some practical examples or procedural way ?
Thanks,
Nikhil
--Smile Always , it costs nothing
-----Original Message----- *From:* Rens Admiraal [mailto:mailinglists@xxxxxxxxxx] *Sent:* Sunday, November 21, 2004 8:52 PM *To:* jonepet@xxxxxxxxx *Cc:* Mulley, Nikhil; php-general@xxxxxxxxxxxxx *Subject:* Re: Crypt Function-- Encryption and Decryption
What would be the use of a hash if it was easy to recover ?
You can use it by storing the hash of a password, en when the user supplies you his password in a script, you hash it again... and compare those two hashes... Trying to recover the value from which the hash is the result is called cracking, and no programming!
Jon-EIrik Pettersen wrote:
Mulley, Nikhil wrote:
Hi All,
I have a password file , which has all the passwords words encrypted with the Crypt Function
I know that Crypt uses one-way algorithm to generate the encryptions and PHP has no Decrypt function , ( but can it be developed to have one ?)
But I am eager to know whether it is really impossible to decrypt the passwords , if possible , how it caqn be done. like salts and all
Can somebody *please* throw more light on Crypt() and Encryption and Decryption in this thread.
Thanks,
Nikhil
As far as I know the standard crypto-methots used in crypt() is one-way-hashing. The data used when encrypting is lost, the encrypted data is generated using this data. There is no other methods to get these data back other than brute-forcing (guess, encrypt with the same algorithm and compare) but it may take months/years depending on the size of the orginal data.
