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NEW QUESTION: 1
100万行を含むTable1という名前のテーブルがあります。 Table1には、機密情報を格納するColumn1という名前の列が含まれています。 Column1はnvarchar（16）データ型を使用します。
Cert1という名前の証明書があります。
Column1を、一方向ハッシュを使用するColumn2という名前の新しい暗号化列に置き換える必要があります。
Column1を削除する前に、どのコードセグメントを実行する必要がありますか？
回答するには、適切なコードセグメントをコードセグメントのリストから回答領域に移動し、正しい順序に並べます。
Answer:
Explanation:
Explanation:
Note:
* There are a few different hashing algorithms available in SQL Server 2005: MD2, MD4, MD5, SHA, SHA1, with each having pros and cons.
* In cryptography, SHA-1 is a cryptographic hash function designed by the United States National Security Agencyand published by the United StatesNISTas a USFederal Information Processing Standard.SHA stands for "secure hash algorithm".The four SHAalgorithmsare structured differently and are distinguished asSHA-0,SHA-1,SHA-2, andSHA-3.SHA-1 is very similar to SHA-0, but corrects an error in the original SHA hash specification that led to significant weaknesses.The SHA-0 algorithm was not adopted by many applications.SHA-2 on the other hand significantly differs from the SHA-1 hash function.
SHA-1 is the most widely used of the existing SHA hash functions, and is employed in several widely used applications and protocols.
* To encrypt a column of data using a simple symmetric encryption
In Object Explorer, connect to an instance of Database Engine.
On the Standard bar, click New Query.
Copy and paste the following example into the query window and click Execute.
USE AdventureWorks2012;
--If there is no master key, create one now.
IF NOT EXISTS
(SELECT * FROM sys.symmetric_keys WHERE symmetric_key_id = 101)
CREATE MASTER KEY ENCRYPTION BY
PASSWORD = '23987hxJKL95QYV4369#ghf0%lekjg5k3fd117r$$#1946kcj$n44ncjhdlj' GO CREATE CERTIFICATE Sales09 WITH SUBJECT = 'Customer Credit Card Numbers'; GO CREATE SYMMETRIC KEY CreditCards_Key11 WITH ALGORITHM = AES_256 ENCRYPTION BY CERTIFICATE Sales09; GO
-- Create a column in which to store the encrypted data.
ALTER TABLE Sales.CreditCard
ADD CardNumber_Encryptedvarbinary(128);
GO
-- Open the symmetric key with which to encrypt the data.
OPEN SYMMETRIC KEY CreditCards_Key11
DECRYPTION BY CERTIFICATE Sales09;
-- Encrypt the value in column CardNumber using the
-- symmetric key CreditCards_Key11.
-- Save the result in column CardNumber_Encrypted.
UPDATE Sales.CreditCard
SET CardNumber_Encrypted = EncryptByKey(Key_GUID('CreditCards_Key11')
, CardNumber, 1, HashBytes('SHA1', CONVERT( varbinary
, CreditCardID)));
GO
Reference:
Ref: http://www.mssqltips.com/sqlservertip/2431/sql-server-column-level-encryption-example-using-symmetric-keys/
NEW QUESTION: 2
A Citrix Engineer is in the process of setting up a remote access solution using self-signed certificates.
To help ensure a secure remote connection, the engineer must install a Root certificate on the
__________ and __________. (Choose the two correct options to complete the sentence.)
A. Delivery Controllers
B. Domain Controllers
C. endpoint device
D. StoreFront server
Answer: C,D
NEW QUESTION: 3
You have a test server that contains a database named DB1. Backups of the database are written to a single backup device. The backup device has a full, differential, and transaction log backup.
You discover that the database is damaged. You restore the database to the point at which the differential backup was taken.
You need to rebuild the database with data stored in the latest transaction logs.
How should you complete the Transact-SQL statement? To answer. drag the appropriate Transact-SQL segments to the correct locations. Each Transact-SQL segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
Answer:
Explanation:
Explanation
Box 1: RESTORE
Box 2: RECOVERY
The RESTORE ... WITH RECOVERY option puts the database into a useable state, so users can access a restored database.
References:
https://www.mssqltips.com/sqlservertutorial/112/recovering-a-database-that-is-in-the-restoring-state/
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