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List:       php-db
Subject:    Re: [PHP-DB] Insecure Hashes (was Re: Beginners Problem)
From:       "J. Hill" <jh () thefirm ! biz>
Date:       2008-01-23 5:01:05
Message-ID: 4796CA11.2080601 () thefirm ! biz
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Well, if you're interested in some greater level of security where you 
can decrypt, you might want to check out rijndael encryption (a type of 
AES). Shane Kretzmann wrote a good rijndael php class that I think is 
still on phpclasses.

It can be a bit difficult working with binary passwords, but if you 
really need security, it seems like one of the better options.

I've been testing it myself, and the only issue I see is, of course: 
keeping the key secret. I've been looking at a few methods, but I'm 
always interested in others ideas on that issue.

Regards,

J. Hill



Cristian Vrabie wrote:
> It's true md5 is very old but is not completely obsolete. Used in 
> combination with a random salt is still hard to decode.
> Maybe i won't use it as encryption for passwords any more but I would 
> use it for digital signature or data integrity check.
>
> sublimino@gmail.com wrote:
>> Whilst reviewing my penetration testing I have noticed that both the
>> md5 and sha1 hashing algorithms are now considered less secure than
>> previously thought. Migration to sha256 is encouraged:
>>
>> http://www.owasp.org/index.php/Cryptography#Algorithm_Selection
>>
>> Then I found the comment below from:
>>
>> http://uk3.php.net/manual/en/function.md5.php
>>
>> http://md5.rednoize.com offers a service to reverse engineer md5
>> hashes. Very useful if you got a md5 hash and need the plain text
>> string of this md5 hash. The website has currently over 47 million
>> hashes stored. It also has support for SHA-1 hashes.
>>
>> Consequently I shall be updating my authentication class.
>>
>>
>> Andy
>>
>>   
>

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