On 06/04/07 17:54, Guy Rouillier wrote:
Ranieri Mazili wrote:
Hello,
I need to store users and passwords on a table and I want to store it
encrypted, but I don't found documentation about it, how can I create
a table with columns "user" and "password" with column "password"
encrypted and how can I check if "user" and "password" are correct
using a sql query ?
Many people consider two-way encryption to be insecure; two-way
encryption means you can decrypt a value if you know the key, and it is
insecure because you usually have to put the key into the source code.
That means at least one person in your company, the programmer
maintaining the source code, can learn all of your users' passwords.
Two-way encryption is needed for companies that store customer
credit cards.
But yes, I've always worried about that.
One
way around that is to hash the value instead. Then to validate, at
runtime you hash the user-entered password using the same hash function,
and validate that it matches the stored hash. No one in your company
ever knows end-user passwords.
--
Ron Johnson, Jr.
Jefferson LA USA
Give a man a fish, and he eats for a day.
Hit him with a fish, and he goes away for good!
