Encryption Performance

Jun 2, 2006

Hi

I am trying to encrypt data using a symmetric key which is encrypted by certificate. I do not want grant control on these objects to the users who wants to decrypt this data. Instead I have created a udf with execute context as "dbo" and used DecryptByKeyAutoCert built-in function.

Now this works fine but large data operations this is extremely slow. It takes around 10 minutes to select decrypted data whic in comparision takes 11 seconds when DecryptByKey function is used.

But I am not sure when DecryptByKey is used, whether the symmetric key is decrypted by the private key of the certificate or not. Can somebody give some explanation of this ?

Also, I can not have a UDF with these following steps

1. Open symmetric key

2. Convert secretdata using DecryptByKey

3. Close Symmetric Key.

4. return decrypted value.

Can some one give some insights on this ?

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Encryption And Query Performance

Feb 20, 2007

I am trying to implement encryption but have run into some serious performance issues. I am required to encrypt the SSN in our database. In and of itself, this is not a problem. The problem comes in because there is also a need to be able to query the table based on the SSN. Since the SSN is encrypted, the query basically performs an index scan, decrypting each value as it goes along. As a result, the query for one record out of 10 million records in the table takes three minutes. It needs to occur immediately.

If I could encrypt my SSN parameter and then compare it to the encrypted value in the column, it would work fine. Unfortunately, everytime you encrypt a particular value, the resultant encrypted value is different. Hence, I have to decrypt the column to match my parameter, instead of encrypting th parameter to match the column.

Does anyone have any suggestions to help alleviate this problem?

Thanks,

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SQL 2005 Encryption And CPU Performance

Jan 27, 2008

Hello All,

Here is the SQL 2005 encryption environment:

1. Clustered SQL 2005 (enterprise edition) on windows 2003. HP (quad processor) with CPU affinity set to all processors.
2. Table structure where encrypted data will be stored has two varbinary (max) columns to store encrypted data. The columns are varbinary (max) b/c the data size could be more that 8K.
3. Encryption using AES (tried both 128/256) algorithm with symmetric keys.

When inserting data in the columns, CPU is staying at 50% when inserting records. Any ideas why this would be happening. Any suggestions on improving performance is appreciated..

Thanks..

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Performance Of Encryption Algorithms

Aug 2, 2006

I am in the stage of design for an application that uses SQL server 2005. We intended to encrypt some sensitve data using the encryption features in SQL server 2005. we will use symmetric key encryption. The question here is which symmetric encryption algorithm has the best performance? how much does the key size affect the perfromance? the data to be encrypted will be some lines of text equal to a word document.
any ideas?

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SQL 2005 And Encryption Performance Overhead

Jul 9, 2007

Does anyone have any specific performance information using AES or other encryption schemes supported by SQL Server 2005?

- What method did you find works best?

- Did you encrypt any XML Data?

- Did you encrypt specific columns or whole tables?

Thanks,

Michael

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SQL Security :: Encryption 2005 - User Defined Function For Encryption And Decryption

Oct 7, 2015

I have created two user defined functions for encryption and decryption using passphrase mechanism. When I call encryption function, each time I am getting the different values for the same input. While I searching a particular value, it takes long time to retrieve due to calling decryption function for each row.

best way to encrypt and decrypt using user defined functions.Below is the query which is taking long time.

SELECT ID FROM table WITH (NOLOCK)
WHERE dbo.DecodeFunction(column) = 'value'

When I try to use symetric or asymetric encryption, I am not able to put "OPEN SYMETRIC KEY" code in a function. So, I am using PassPhrase mechanism.

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[Performance Discussion] To Schedule A Time For Mssql Command, Which Way Would Be Faster And Get A Better Performance?

Sep 12, 2004

1. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection

above, which way would be faster and get a better performance?

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Extremely Poor Query Performance - Identical DBs Different Performance

Jun 23, 2006

Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***

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Very Poor Performance - Identical DBs But Different Performance

Jun 22, 2006

Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server witha particular query. It would take approximately 22 seconds to return100 rows, thats about 0.22 seconds per row. Note: I ran the query insingle user mode. So I tested the query on the Development server bytaking a backup (.dmp) of the database and moving it onto the devserver. I ran the same query and found that it ran in less than asecond.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue isrelated to some external hardware issue like: disk space, memory etc.Or could it be OS software related issues, like service packs, SQLServer configuations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating systemrelated issue.Any Ideas would help me greatly!Thanks,Brian T

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Encryption

Aug 4, 2000

I was wondering if anyone out there knows if it is possible to encrypt a particular field in a table, or encrypt a whole table. The info would remain on my database and not be sent out anywhere, but I just want an extra level of security against anyone who might try to break into the database.

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Encryption

Feb 23, 2000

Is there a function that can encryp the data in a table(or certain column)?
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Kevin

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Jun 19, 2002

Hello,

Is there a way to encrypt the data ( I mean actual data stored
in a table)in a SQLServer.
I know how to encrypt procedures, views, Net-libraries ......

Please help!!!!

Thanks.

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Aug 23, 2002

How to get the encryption of certain characters, such as '12345' or 'hello'. Is any function to take regular characters and return the encryption form of those characters?
Please help.

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Nov 6, 2005

My client requested that the password field of a login table be encrypted using H5 Encryption. I've been searching throughout the net and MSDN for the function or procedure and can't find it. Does anybody know how?

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Encryption

Apr 23, 2008

I developed a small VB6 application VB6 that get data from SAP sql database

Now they want that the users logon to this small app using the same username & password that they used in SAP

I can read the users' table, I can get the username
But the password is encrypted

Probably with a Function

Anybody know how can I encrypt the typed password so I can compare with the saved password

I don't want to view or modify them, just compare with the password typed by the user

Thanks

JG

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Encryption

Jul 7, 2005

Hello,
I am needing to migrate an Access database to Sql Server
Express. This database will be distributed as part of a
VB 6 application. This database will have some of the
columns encrypted. My understanding is that SQL Server
Express supports encryption. We will need to be able to
run queries on encrypted data like this, with
LastName being an encrypted column in the database.

Select LastName from Account where LastName = 'Smith'
Select LastName from Account where LastName Like 'Sm%'
Update Account Set where LastName = sLastName

Can this be done using SQL Server 2005 Express and VB 6?

Thanks!

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Encryption

Apr 4, 2007

hi all,
ive download some application, but they encrypt their Stored Proc and some Views..
1.how to encrypt SP?
2.is it possible to decrypt whateva that encrypted?

~~~Focus on problem, not solution~~~

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Oct 3, 2007

Hai
I am new to SQL server and working on Encryption.I just want to know whether it is better to encrpt a data in database or in the code itself.I want to encrypt a number and not a text.which one would u suggest RC4 algorithm or pwdencrypt..any one plz reply soon..

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Oct 3, 2007

Hi. Im new to SQLserver. I need to encrypt a column of datatype decimal. Which is better RC4 Algorithm or PWDencrypt() and PWDcompare().

Sundaresan.R

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Feb 28, 2008

how i can open encrypted stored procedure

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Apr 12, 2007

Hi,
i was wondering if the whole table can be encrypted using MS SQL Server 2005. This at present can be done using third party softwares.
Performance won't be an issue.

Thanks and regards,
Chandrachurh

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Jan 11, 2008

I am using server 2005 running on a windows server 2003 platform. I am trying to do field encryption using symmetric key implemented by the AES algorithm. I created an AES key and apparently it encrypts the data with no problem, however when I try to retrieve the data after decryption the field is always null. I tried using the same process while using the DES or RC2 algorithm and I could both encrypt and decrypt information, however it does not decrypt for any of the AES algorithm i.e. AES_128, AES_192 and AES_256. Attached is a simple query I used to test it.

create symmetric key CCardKeys
with algorithm = aes_192
encryption by password = 'P@s$w0rD'

open symmetric key CCardKeys
decryption by password = 'P@s$w0rD'

declare @Id varchar(50)
set @Id = encryptbykey(key_guid('CCardKeys'),'Test')

select convert(varchar(50),decryptbykey(@Id))

close symmetric key CCardKeys

Is there something I'm missing with AES.

Thanks for taking the time to help me.

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Apr 19, 2007

Here is my goal please let me know if it is possible.

I have installed sql express on clients machines. I don't want them to be able to view the sp's or the functions. I would like to go as far as not allowing them to see the tables. I tried with encrption but this is still breakable by the user using the DAC.

Thanks

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Mar 5, 2007

I have a user table with Fields:

UID, name, SSN, phone,address. I need to encrypt all the fields except UID. My company recently moved to sql server 2005 and I have to encrypt old data. We do perform query search based on username and SSN

I have very shallow knowledge of encryption and indexes. I did looked at one of the articles on encrypting data on existing application but could not understand the indexing part(:()

Do i have to define new fields with varbinary as datatype(for ssn, name,phone number) ? I am asking this because in the demo only ssn_index has varbinary and the ssn field is still nvarchar?

Any help will be appreciated.

Thanks,

K

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Sep 4, 2006

I have tried to encrypt by certificate and by symmetric key. In all cases the decryption comes back as null. Any ideas why?

I have used the code from a learnin tree course and the encryption works OK. I have also added a grant to the certificate to the login

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Apr 19, 2007

I am trying to create a encrypted row in my database Everything here worked except that when i run the final query to decrypt the data It just comes up with null for each row. Even if i do a query to show me the rows that are not null It's like it is saying yeah there is data here but I am only going to show you null instead of what I am supposed to decrypt.Here is what I tried from start to finish Create Certificate
TestCert
Encryption By Password = 'Password'
With Subject = 'SQLCert',
Expiry_Date = '12/01/2050';

declare @Test nvarchar(50)
set @Test='123456789'

insert into testenc (testencry)
Values
(encryptbyCert(Cert_ID('TestCert'),@Test ))

select convert (Nvarchar(50),
DecryptByCert(Cert_ID('TestCert'),
testencry,N'Password')) As Test
from testenc

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Jul 20, 2007

i have to encrypt my data in sql2005 database using assymetric key encryption which i have done properly.But i have a doubt that while writing stored procedure i have to provide key information in it , that will be visible to everyone then whats the use of taht encryption. Can anyone tell me how can i write stored procedure without providing key information in it.

Divya

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Aug 2, 2007

Hi,

i am trying to encrypt my database using dbEncrypt software.The encryption provides role based access ot the database.In that case developer can not call any stored procedure of that database. These two are conflicting things. Can anyone suggest me a way so that i can access the stored procedure through my code by checking the roles from the front end. is it possible??
Please reply soon.

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Sep 12, 2007

Hi all Im used to work on mysql and in that Db you can call the password function to encrypt password, so that people browsing directly the db can't see others password.
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Apr 30, 2008

Does SQL Server 2005 not have a built in encryption function. I'm trying to INSERT and store passwords as an encrypted value in my table. Any help appreciated. Thanks.

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Nov 29, 2003

Hello everyone,

i need an advice in encryption in sql server 2000

which is better, to encrypt the password in asp.net and send it to the sql server already encrypt it, or to encrypt the password in the sqlserver ???

and also does anybody know if there is a tutorial about security in sql server i can use to secure my application.

Kind Regards

Mahmoud Manasrah

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May 29, 2001

Hi,

I have created a DTS package on my SQL 7.0 SP3 server which simply reads a table on another SQL 7.0 server and populates a local table with the information that has been read.

Whenever I try to execute the DTS package (via Run or scheduling it) I get the following error:

-------------------------------------------------------------------------
... DTSRun: Executing... DTSRun OnStart: Delete from Table [AfterSalesAccessories].[dbo].[model_derivative] Step DTSRun OnError: Delete from Table [AfterSalesAccessories].[dbo].[model_derivative] Step, Error = -2147217887 (80040E21) Error string: The property 'Use Encryption for Data' is not supported. Error source: Microsoft Data Transformation Services (DTS) Package
-------------------------------------------------------------------------

I have not selected the encryption option and can't see what I'm doing wrong.
Has anybone else seen this ? I've looked on Technet but no joy.

Thanks,

Tim

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Jun 14, 2001

I am 99% sure SQL Server 7.0 cannot encrypt data in an individual column. Can anyone tell me whether I am right or wrong?

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