Encrypt Stored Passwords

Sep 18, 2001

I'm running SQL 70 SP 3 on Nt4.

We store passwords of users of our website. They need to be autenticated and based on that it gives them access to what they are entitled. But its not like NT or server authentication.

This has been setup so that we have a user table and it stores the password. However, it stores it in plain text. Is there any way I can encrypt this field so it is unreadable? Is there a property or a datatype that I can't find? Is there a way to simulate the encryption?

Any ideas or help are appreciated.

Thanks
Kelsey

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Oct 17, 2007

Hi, Is it possible to store encryped user passwords in a table and be able to retieve them in readable form.

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I am trying to insert data in a table using a stored procedure, but somehow I cannot store the values passed by the stored procedure in the table.

Table has two fields FIRST_NAME, LAST_NAME with varbinary data type(I need to encrypt the data)

My stored procedure is as follows. Please let me know what i am doing wrong!

***************************************************************

ALTER PROCEDURE [dbo].[SP_InsertInfo]
-- Add the parameters for the stored procedure here

@FIRST_NAME varBINARY(100)
,@LAST_NAME varBINARY(100)

AS
OPEN SYMMETRIC KEY key DECRYPTION BY CERTIFICATE cert

BEGIN

SET NOCOUNT ON;

-- Insert statements for procedure here

Insert into [dbo].[INFO] (FIRST_NAME, LAST_NAME)
Values ( encryptbykey( key_guid('key'),'@FIRST_NAME'),
encryptbykey( key_guid('key'),'@LAST_NAME')
)
close SYMMETRIC KEY key

END

**********************************************
EXEC sp_InsertInfo 'larry', 'Smith'

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Hi,

I'm trying to use a stored procedure to encrypt data but it dosent work fine, this is how I proceeded and that worked well

Code Snippet

CREATE PROCEDURE [dbo].[UpdateUser]

@CardNumber nvarchar(max),

@UserID int

AS

BEGIN

SET NOCOUNT ON;

DECLARE @SecretData varbinary(max)

OPEN SYMMETRIC KEY MY_SYMMETRIC_KEY

DECRYPTION BY CERTIFICATE [MY_CERTIFICATE]

DECLARE @KeyGuid AS UNIQUEIDENTIFIER

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SET @SecretData = encryptbykey( @KeyGuid, @CardNumber)

UPDATE User

SET

CardNumber=@SecretData

Where UserID=@UserID

CLOSE SYMMETRIC KEY MY_SYMMETRIC_KEY

END

but Now I use my Stored Procedure to encrypt the data, but I'm getting bad data when I decrypt.

Code Snippet

CREATE PROCEDURE [dbo].[UpdateUser]

@CardNumber nvarchar(max),

@UserID int

AS

BEGIN

SET NOCOUNT ON;

DECLARE @SecretData varbinary(max)

exec EncryptData @CardNumber, @SecretData output

UPDATE User

SET

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END

Code Snippet

CREATE PROCEDURE [EncryptData]

@ClearData varchar(max),

@SecretData varbinary(max) output

WITH EXECUTE AS 'DBO'

AS

BEGIN

OPEN SYMMETRIC KEY MY_SYMMETRIC_KEY

DECRYPTION BY CERTIFICATE [MY_CERTIFICATE]

DECLARE @KeyGuid AS UNIQUEIDENTIFIER

SET @KeyGuid = key_guid( 'MY_SYMMETRIC_KEY')

SET @SecretData = encryptbykey( @KeyGuid, @ClearData)

CLOSE SYMMETRIC KEY My_SYMMETRIC_KEY

END

Any Idea how to fix this issue

Thanks in advance.

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