SQL Server Field Level Encryption
Sep 16, 2005
Where can I get some information on field-level encryption in SQL Server? My users will be installing my ASP.NET app on a laptop and taking it out "into the field". If it gets stolen they want some safeguards.I've suggested that they encrypt the hard drive and things, but they want field-level encryption for the data. I know how to do things like hash a password, but that doesn't help with retrieval. I have to be able to search on and decode the data. For example, I have SSN as a field. I need to be able to search on SSN, display it to the user, and allow them to change it.The other problem is partial searches. If I encrypt SSN in the database then I can probably just search on the hashed value, but if I want to search on "smith" and get all of the smiths, smithes, etc., then I can't search on the encrypted value. I have about 1 million records, so decrypting each name to do the search would be prohibitive.Anyway, I'm sure this has been done, so if there is a thread or a site that discusses this I'd be willing to read up on it.
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Jan 16, 2008
I want to perform column level and database level encryption/decryption....
Does any body have that code written in C# or VB.NET for AES-128, AES-192, AES-256 algorithms...
I have got code for single string... but i want to encrypt/decrypt columns and sometimes the whole database...
Can anybody help me out...
If you have Store procedure in SQL for the same then also it ll do...
Thanks in advance
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Jul 10, 2015
We have a need for getting data from sqlserver DB on premise to the cloud. DB is not encrypted currently, other applications are accessing it but those applications are on premise. Following link talks about encrypted connection, but is it possible to encrypt only one of the port connection. we can add a custom port.URL...
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Jun 17, 2015
I need to encrypt some column level data in multiple tables in SQL server 2014. I've never tried encryption in SQL server 2014. How can I achieve it?
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Mar 17, 2000
Hi,
Does anyone know how to encrpyt a field in a table created in SQL Server Database.
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Dec 4, 2007
What is best way to encrypt password field in sql server 2000?.
Is there any system stored procedure to encrypt password?.
What kind of algorithm password encryption method uses?.
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Jun 26, 2007
Does anyone have any insight as to whether the new data encryption features of SQL Server 2005 work when the database is set to compatibility level 80?
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Oct 14, 2006
Developing an application, which is handling encrypting for a SQL server 2005 DB at the application level, using symmetric AES encryption. After being encrypted the data is being sent to the SQL server 2005 DB to be inserted. This is what I want to accomplish. But I have one or two questions as I am going through the research for my project.
Encrypting the data shouldn€™t be that big a deal, but can SQL server 2005 handle to insert these data? If yes how? I am thinking just simple SQL INSERT statements?
When the data are inserted can SQL server, as it supports AES encryption, through the DBMS decrypt the data as they have been encrypted else where and then perform specific functions? (by specific function I just mean any function that may have to run, it could be any function one could think of)
How difficult would it be to take the encrypted data from SQL server to the application and then at the application level decrypt these?
Any help on the above questions is highly appreciated or if people have any comment on the subject I would be more than happy to receive these.
Thank you
Kenn Kikkenborg
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Oct 14, 2006
Developing an application, which is handling encrypting for a SQL server 2005 DB at the application level, using symmetric AES encryption. After being encrypted the data is being sent to the SQL server 2005 DB to be inserted. This is what I want to accomplish. But I have one or two questions as I am going through the research for my project.
Encrypting the data shouldn€™t be that big a deal, but can SQL server 2005 handle to insert these data? If yes how? I am thinking just simple SQL INSERT statements.
When the data are inserted can SQL server, as it support AES encryption, through the DBMS decrypt the data as they have been encrypted else where and then perform specific functions? (by specific function I just mean any function that may have to run, it could be any function one could think of)
How difficult would it be to take the encrypted data from SQL server to the application and then at the application level decrypt these?
Any help on the above questions is highly appreciated or if people have any comment on the subject I would be more than happy to receive these.
Thank you
Kenn Kikkenborg
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May 11, 2015
I want to enforce a unique constraint on a column which must be encrypted in MSSQL 2005 using Cell Level Encyption (CLE).
   CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'itsaSECRET!!!3£3£3£!!!'
   CREATE CERTIFICATE ERCERT WITH SUBJECT = 'A cert for use by procs'
   CREATE SYMMETRIC KEY ERKEY
   WITH ALGORITHM = AES_256
   ENCRYPTION BY CERTIFICATE ERCERT
[Code] ....
The output makes it obvious why the constraint has 'not' been enforced.
       Email
      -------
   1 | 0x00703529AF46D24BA863A3534260374E01000000328909B51BA44A49510F24DF31
C46F2E30977626D96617E2BD13D9115EB578852EEBAE326B8F3E2D422230478A29767C
   2 | 0x00703529AF46D24BA863A3534260374E01000000773E06E1B53F2C57F97C54370FECBB45B
C8A154FEA5CEEB9B6BB1133305282328AAFAD65B9BDC595F0006474190F6482
   3 | 0x00703529AF46D24BA863A3534260374E01000000C9EDB1C83B52E60598038D832D34
D75867AB0ABB23F9044B7EBC76832F22C432A867078D10974DC3717D6086D3031BDB
But, how do I work around this?
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Oct 30, 2006
Hi All,
I need to create a new field on a table and have that field default to another field value in that same table. Is there a way to do this w/ a default constraint rather than adding a trigger to the table? If i can't use a default constraint does anyone have a template trigger i could use? Below is an example of what i'm trying to do (Field_C is the new field and i want it to use Field_A value if no other value is specified on insert). Any help would be greatly appreciated.
alter table FOO add Field_C varchar(50) not null constraint FOO_default DEFAULT Field_A
thanks,
Dave
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Jul 30, 2007
Hello all,
This is the best suited forum I found that fits my problem. If there's a better one, please direct me to it.
I have an Access database that contains (for the purpose of my application) a lot of information (15,000+ records in one of the tables).
My application suffers from slow performance because of the size of the tables (this is because the data has to be compared to data on a Palm device).
I have done a lot of optimizations to the code, but I haven't found a way to implement the best optimization for my case: Getting row- and field-level modification dates.
That way I can only compare relevant data and not the whole database.
For example, I wish there was a way to filter out rows from a table that were modified before January 1st, 2007.
Another example: Filter out rows that their Address column was modified in the last two weeks.
I know that a partial solution will be to implement this on my own: adding a Modified column to all my tables.
But, as I said, this is only a partial solution because it saves only the row's modification date, and not for each of the fields. Plus, this is a really ugly solution, having this column standing out everywhere.
Is there a chance this is implemented inside Access (or SQL server, for that matter)?
The closest I came was finding out that there's a field in msysobjects that specifies when a table was last modified. But not a row or a field in a row.
Any help will be greatly appreciated!
Thanks.
P.S. The weird thing is that this "modified" bit that I'm looking for is implemented on Palm devices and is very easy to use... Seems ironic that there won't be a simple way to do this on a PC.
P.P.S. I guess row- and field-level modification dates are the same... of course, Modified(row) = MAX(Modified(field1), Modified(field2), ...)
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Jul 30, 2007
Hello all,
(This was previously posted @ http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1935938&SiteID=1&mode=1, I transferred it here because it's more relevant)
I have an Access database that contains (for the purpose of my application) a lot of information (15,000+ records in one of the tables).
I use C++ non-.NET ADO in order to access that database (msado15.dll).
My application suffers from slow performance because of the size of the tables (this is because the data has to be compared to data on a Palm device).
I have done a lot of optimizations to the code, but I haven't found a way to implement the best optimization for my case: Getting row- and field-level modification dates.
That way I can only compare relevant data and not the whole database.
For example, I wish there was a way to filter out rows from a table that were modified before January 1st, 2007.
Another example: Filter out rows that their Address column was modified in the last two weeks.
I know that a partial solution will be to implement this on my own: adding a Modified column to all my tables.
But, as I said, this is only a partial solution because it saves only the row's modification date, and not for each of the fields. Plus, this is a really ugly solution, having this column standing out everywhere.
Is there a chance this is implemented inside Access (or SQL server, for that matter)?
The closest I came was finding out that there's a field in msysobjects that specifies when a table was last modified. But not a row or a field in a row.
Any help will be greatly appreciated!
Thanks.
P.S. The weird thing is that this "modified" bit that I'm looking for is implemented on Palm devices and is very easy to use... Seems ironic that there won't be a simple way to do this on a PC.
P.P.S. I guess row- and field-level modification dates are the same... of course, Modified(row) = MAX(Modified(field1), Modified(field2), ...)
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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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Nov 19, 2007
Hi,
AM in need of SSRS 2005 design documents for a project purpose. Can somebody let me know where can i find these documents? Thanks in advance
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Jul 12, 2001
How do we Encrypt a field values of a table in SQL Server 7.0
Bye
Amar
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Mar 5, 2005
hey ppl..
i am creating a client that can access straight into the sql db using vb.net.
is there a way encrypt the data from the client and the sql server will decrypt the data and visa versa?
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May 13, 2006
I'm trying to encrypt a column in my table using
EncryptWithPassPhrase( @PASSPHRASE, @COLUMNDATA)
My Question is, does PASSPHRASE have to be (at least ) as long as the column data? Is there a problem if it is longer>
I'm only storing part of the results, and it looks like the # of characters I'm storing is the length of my passphrase.
Thanks,
Phil
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Nov 2, 2007
I am using SQL Server Encryption functions to encrpt the data.I also use that column in my search criteria.
While seaching fro that binary column it is really slow. Its doing index scan on the table. Following are the steps i follow:-
I encrupt the actual value & then search it in the encrypted column in the database.
Any suggestions or experiences please le me know
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Oct 3, 2007
Hello guys. Here's the scenario. I'm opened to any suggestions. We have thousands of users with laptops running Windows XP SP2. The users login as the Admin of the machine. I know, I know, very bad practice and I totally agree with you. For whatever reason that part has to remained unchanged. In the Laptop we will install an application that will need to work offline so the application will maintain the data using SQL Server 2005 Express. We need to encrypt the whole DB, meaning we need to encrypt the Data File(s) + the Log File(s).
Requirements:
1. We need Stored Procedures (SQL Server 2005 Compact is out of the question).
2. The encryption has to be transparent to the client and Stored Procedures (meaning no column nor table encryption)
3. Whatever method used has to be able to work around the fact the user running is an admin (Windows EFS is out of the question)
Does SQL Server 2005 Standard allow whole DB encryption? How about SQL Express?
We found NetLib Encryptionizer which is exactly what we want, but we do not want to limit our options so we are still looking for other posiblities.
What do you guys recommend?
Thanks...
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May 6, 2008
Hi - this is a repost of a question that I originally posted in Security. Ok, I'm very new to this topic. I'm working on an application that
requires that some information in the db be encrypted and then
decrypted when retrieved. I have everything set up and it works fine
except for one thing. I can't seem to be able to pass a parameter into
the sp that is used to decrypt the key. It only seems to take the
string when typed in. I really think I'm missing something here. It
doesn't seem all that great to have your password hard-coded into the
stored procedure. Maybe I'm just screwing something up? Anyway, I
can't get it to work if it looks like this:OPEN SYMMETRIC KEY Key_NameDECRYPTION BY PASSWORD = @pwdThis does work:OPEN SYMMETRIC KEY Key_NameDECRYPTION BY PASSWORD = 'password'This
has to be some goof on my part right? If the db machine is compromised
you're giving the keys to decrypt the data away as well - they just
haver to open your stored proc. You should keep them separate imo and
I hope someone can set me straight. Also, encrypting the stored
procedure is an option, but it's very easy to decrypt from what I've
read. Can someone help point me in the right direction? Thanks! And thanks to the mod that suggested moving this post. Any help will be appreciated.
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Jun 11, 2008
I am having a problem with some code I have in a DLL that is running in SQL Server 2005. I am trying to get some RSA encryption and decryption. The encrypt code runs in SAFE mode without a problem. The decrypt code gets and error:
Msg 6522, Level 16, State 1, Line 1
A .NET Framework error occurred during execution of user-defined routine or aggregate "March_CryptoDecrypt":
System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
System.Security.SecurityException:
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters)
at System.Security.Cryptography.RSA.FromXmlString(String xmlString)
at Crypto.DoCrypto.Decrypt(String P_text, String P_privateKey)
at SQLServerCrypto.Decrypt(SqlString P_text, SqlString P_privateKey)
Here is the decrypt code:
static public string Decrypt(string P_text, string P_privateKey)
{
string retStr;
string encryptedBlock = "";
string localTextStr = P_text;
int numberOfBlocks;
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
rsaProvider.FromXmlString(P_privateKey);
Queue<string> encryptedBlocks = new Queue<string>();
while (localTextStr.Length != 0)
{
if (rsaProvider.KeySize == 1024)
{
encryptedBlock = localTextStr.Substring(0, localTextStr.IndexOf("=") + 1);
encryptedBlocks.Enqueue(encryptedBlock);
localTextStr = localTextStr.Remove(0, encryptedBlock.Length);
}
else
{
encryptedBlock = localTextStr.Substring(0, localTextStr.IndexOf("==") + 2);
encryptedBlocks.Enqueue(encryptedBlock);
localTextStr = localTextStr.Remove(0, encryptedBlock.Length);
}
}
encryptedBlocks.TrimExcess();
numberOfBlocks = encryptedBlocks.Count;
retStr = "";
for (int cnt = 1; cnt <= numberOfBlocks; cnt++)
{
encryptedBlock = encryptedBlocks.Dequeue();
retStr +=
ASCIIEncoding.ASCII.GetString(rsaProvider.Decrypt(
Convert.FromBase64String(encryptedBlock), false));
}
return (retStr);
}
Here is the encrypt code that works:
static public string Encrypt(string P_text, string P_publicKey)
{
string retStr;
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();
rsaProvider.FromXmlString(P_publicKey);
int numberOfBlocks = (P_text.Length / 32) + 1;
char[] charArray = P_text.ToCharArray();
byte[][] byteBlockArray = new byte[numberOfBlocks][];
int incrementer = 0;
for (int cnt = 1; cnt <= numberOfBlocks; cnt++)
{
if (cnt == numberOfBlocks)
{
byteBlockArray[cnt - 1] =
ASCIIEncoding.ASCII.GetBytes(charArray, incrementer, charArray.Length - incrementer);
}
else
{
byteBlockArray[cnt - 1] =
ASCIIEncoding.ASCII.GetBytes(charArray, incrementer, 32);
incrementer += 32;
}
}
retStr = "";
for (int cnt = 0; cnt < byteBlockArray.Length; cnt++)
{
retStr += System.Convert.ToBase64String(
rsaProvider.Encrypt(byteBlockArray[cnt], false));
}
return (retStr);
}
I do not see why the encrypt can run is safe mode and the decrypt can not. Does anyone have any ideas?
Thank You,
David Demland
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Jun 20, 2006
Hi All,Does any body know how to use encryption in sql server 2005.Is itpossible to encrypt a particular column in a table.thanks
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Jan 10, 2007
I was wondering whether anyone ever dealt with encryption that are visacompliant with credit card numbers:On 3.4 of this document(http://usa.visa.com/download/busine...ty_Standard.pdf)It states the encryption:One-way hashes (hashed indexes), such as SHA-1- Truncation- Index tokens and PADs, with the PADs being securely stored- Strong cryptography, such as Triple-DES 128-bit or AES 256-bit withassociated keymanagement processes and procedures1. One way hashes cannot be decrypted so this won't work2. Triple DES works however we will need to encrypt SSN. Triple DESdoesn't encrypt 2 values the same way, so we cannot use it as anindex key that we wanted to. The decrypted value comes out the samehowever the encrypted values are always different. We can't do tablescans for a SSN look up.3. Truncation - I have no idea4. Index token or PAD seems like one way encryption and never can bedecrypted (not sure what this is for if it can't be decrypted)So how do I get this to work?? It doesn't say RSA is compliant either.If you think RSA is okay, where does it EXPLICITLY say that on thisdocument???:D
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Aug 28, 2007
If I understand all the posts/documentation correctly am I correct in saying that sql server will not send a symmetric key outside of database.
For Eg can I use ADO.Net to get the key from database into a C# application to do encryption/decryption in the C# application outside of database. I want the C# application to be able to encrypt/decrypt data using .Net cryptography api's but use sql server as key store in addition to encryption/decryption.
thanks for the help
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Jun 6, 2007
Hi,
When I am trying to access SQL Server 2000 database from another machine i got this error
Server: MSg 17, Level 16, State 1 [Microsoft][ODBC SQL Server Driver][DBNETLIB]SQL Server does not exist or access denied
but I could access the database on same server and in that server i could access other databases in different server.
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Feb 19, 2008
Hi.
I have a SQL Server 2000 database that contains information I would like to encrypt. The information is a field inside a table, and I would like to encrypt this information using a key, and decrypt it in my asp.net application using that key and use the decrypted data.
Please tell me how this can be done, or direct me to an article or a link on the subject.
Thanks in advance.
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Jun 23, 2004
Are there any UDf's or Xtended stored procs available in sql server 2k that can encrypt a column that has the CC #'s or do I need to purchase a 3rd party tool ?
thanks,
Dinakar
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Mar 13, 2007
I know there is no native encryption in SQL2K, but what 3rd party encryption tools would other forum members recommend from experience? I am required to encrypt data for PCI compliance.
Thanks
Lempster
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Apr 14, 2015
I inherited a lot of Servers to upgrade to 2014 to include an SSRS Server.
The encryption Key was never backed up and it seems that no one knows what the password is?
Do I have to manually load the reports? There are a lot of Reports.
[URL]
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Jul 20, 2005
I was reading that Net-Library Encryption is an SSL utility. Does thatmean the traffic uses TCP port 443 or does it still use TCP 1433?Thanks.http://msdn.microsoft.com/library/d..._ar_cs_6fu6.asp
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May 18, 2006
I developed an app which stored data in SQL 2005, and encrypted some data using EncryptByPassPhrase( PassPhrase, TheData ), DecryptByPassPhrase( PassPhrase, TheData).
One of the implementations of this will have to store the data in SQL 2000, which doesn't support this functionality. Is there a simple data encryption functionality somewhere that I can implement within a stored proc so I can have my app be independent of the back-end data base server?, i.e. so I can have two different stored procedures depending on the back end db, and not to have the front end handle the encryption?
Thanks
Phil
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Jan 25, 2008
Hello,
I store data in an .mdf file (I use SQL server 2005), because this way it's easier to move the application from one machine to another.
I've faced a problem with the encryption of the database.
Is there a possibility/way to encrypt a database file so that, if someone else finds/copies the mdf, he/she won't be able to read it.
I thought about encrypting the string values of the tables itself and decode them inside the application and encide when Inserting, but why inventing somehing that might already exist.
Thank you.
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