Used To Generate An Encryption Key
To generate a data key, specify the symmetric CMK that will be used to encrypt the data key. You cannot use an asymmetric CMK to generate data keys. To get the type of your CMK, use the DescribeKey operation. You must also specify the length of the data key. Use either the KeySpec or NumberOfBytes parameters (but not both). About RandomKeygen Our free mobile-friendly tool offers a variety of randomly generated keys and passwords you can use to secure any application, service or device. Free xbox 360 key generator. Simply click to copy a password or press the ' Generate ' button for an entirely new set.
Deleting and recreating encryption keys are activities that fall outside of routine encryption key maintenance. You perform these tasks in response to a specific threat to your report server, or as a last resort when you can no longer access a report server database.
Specifies the encryption context that will be used when encrypting the data key. An encryption context is a collection of non-secret key-value pairs that represents additional authenticated data. When you use an encryption context to encrypt data, you must specify the same (an exact case-sensitive match) encryption context to decrypt the data. The Raw AES keyring is equivalent to and interoperates with the JceMasterKey in the AWS Encryption SDK for Java and the RawMasterKey in the AWS Encryption SDK for Python when they are used with symmetric encryption keys. You can encrypt data with one implementation and decrypt the data with any other implementation using the same wrapping key. Aug 08, 2018 If we generate a 16-byte output (32 hex characters), we have a 128-bit key, and a 32-byte output (64 hex characters) will generate a 256-bit key. HKDF is used in TLS 1.3 for generating encryption. In a session that uses symmetric encryption, multiple keys can be used, but a message that is encrypted with one key is decrypted with that same key. In asymmetric encryption, there are two keys, and data that is encrypted with one key can only be decrypted with the other key – unlike in symmetric encryption, when the same key both encrypts.
Recreate the symmetric key when you believe the existing symmetric key is compromised. You can also recreate the key on a regular basis as a security best practice.
Delete existing encryption keys and unusable encrypted content when you cannot restore the symmetric key.
Recreating Encryption Keys
If you have evidence that the symmetric key is known to unauthorized users, or if your report server has been under attack and you want to reset the symmetric key as a precaution, you can recreate the symmetric key. When you recreate the symmetric key, all encrypted values will be re-encrypted using the new value. If you are running multiple report servers in a scale-out deployment, all copies of the symmetric key will be updated to the new value. The report server uses the public keys available to it to update the symmetric key for each server in the deployment.
You can only recreate the symmetric key when the report server is in a working state. Recreating the encryption keys and re-encrypting content disrupts server operations. You must take the server offline while re-encryption is underway. There should be no requests made to the report server during re-encryption.
You can use the Reporting Services Configuration tool or the rskeymgmt utility to reset the symmetric key and encrypted data. For more information about how the symmetric key is created, see Initialize a Report Server (SSRS Configuration Manager).
How to recreate encryption keys (Reporting Services Configuration Tool)
Disable the Report Server Web service and HTTP access by modifying the IsWebServiceEnabled property in the rsreportserver.config file. This step temporarily stops authentication requests from being sent to the report server without completely shutting down the server. You must have minimal service so that you can recreate the keys.
If you are recreating encryption keys for a report server scale-out deployment, disable this property on all instances in the deployment.
Open Windows Explorer and navigate to drive:Program FilesMicrosoft SQL Serverreport_server_instanceReporting Services. Replace drive with your drive letter and report_server_instance with the folder name that corresponds to the report server instance for which you want to disable the Web service and HTTP access. For example, C:Program FilesMicrosoft SQL ServerMSRS10_50.MSSQLSERVERReporting Services.
Open the rsreportserver.config file.
For the IsWebServiceEnabled property, specify False, and then save your changes.
Start the Reporting Services Configuration tool, and then connect to the report server instance you want to configure.
On the Encryption Keys page, click Change. Click OK.
Restart the Report Server Windows service. If you are recreating encryption keys for a scale-out deployment, restart the service on all instances.
Re-enable the Web service and HTTP access by modifying the IsWebServiceEnabled property in the rsreportserver.config file. Do this for all instances if you are working with a scale out deployment.
How to recreate encryption keys (rskeymgmt)
Disable the Report Server Web service and HTTP access. Use the instructions in the previous procedure to stop Web service operations.
Run rskeymgmt.exe locally on the computer that hosts the report server. Use the -s argument to reset the symmetric key. No other arguments are required:
Restart the Reporting Services Windows service.
Deleting Unusable Encrypted Content
If for some reason you cannot restore the encryption key, the report server will never be able to decrypt and use any data that is encrypted with that key. To return the report server to a working state, you must delete the encrypted values that are currently stored in the report server database and then manually re-specify the values you need.
Deleting the encryption keys removes all symmetric key information from the report server database and deletes any encrypted content. All unencrypted data is left intact; only encrypted content is removed. When you delete the encryption keys, the report server re-initializes itself automatically by adding a new symmetric key. The following occurs when you delete encrypted content:
Connection strings in shared data sources are deleted. Users who run reports get the error 'The ConnectionString property has not been initialized.'
Stored credentials are deleted. Reports and shared data sources are reconfigured to use prompted credentials.
Reports that are based on models (and require shared data sources configured with stored or no credentials) will not run.
Subscriptions are deactivated.
Once you delete encrypted content, you cannot recover it. You must re-specify connection strings and stored credentials, and you must activate subscriptions.
You can use the Reporting Services Configuration tool or the rskeymgmt utility to remove the values.
How to delete encryption keys (Reporting Services Configuration Tool)
Start the Reporting Services Configuration tool, and then connect to the report server instance you want to configure.
Click Encryption Keys, and then click Delete. Click OK.
Restart the Report Server Windows service. For a scale-out deployment, do this on all report server instances.
How to delete encryption keys (rskeymmgt)
Run rskeymgmt.exe locally on the computer that hosts the report server. You must use the -d apply argument. The following example illustrates the argument you must specify:
Restart the Report Server Windows service. For a scale-out deployment, do this on all report server instances.
How to re-specify encrypted values
For each shared data source, you must retype the connection string.
For each report and shared data source that uses stored credentials, you must retype the user name and password, and then save. For more information, see Specify Credential and Connection Information for Report Data Sources.
For each data-driven subscription, open each subscription and retype the credentials to the subscription database.
For subscriptions that use encrypted data (this includes the File Share delivery extension and any third-party delivery extension that uses encryption), open each subscription and retype credentials. Subscriptions that use Report Server e-mail delivery do not use encrypted data and are unaffected by the key change.
See Also
Configure and Manage Encryption Keys (SSRS Configuration Manager)
Store Encrypted Report Server Data (SSRS Configuration Manager)
The Java KeyGenerator class (javax.crypto.KeyGenerator) is used to generate symmetric encryption keys. A symmetric encryption key is a key that is used for both encryption and decryption of data, by a symmetric encryption algorithm. In this Java KeyGenerator tutorial I will show you how to generate symmetric encryption keys.
Creating a KeyGenerator Instance
Used To Generate An Encryption Keys
Before you can use the Java KeyGenerator class you must create a KeyGenerator instance. You create a KeyGenerator instance by calling the static method getInstance() passing as parameter the name of the encryption algorithm to create a key for. Here is an example of creating a Java KeyGenerator instance:
This example creates a KeyGenerator instance which can generate keys for the AES encryption algorithm.
Initializing the KeyGenerator
After creating the KeyGenerator instance you must initialize it. Initializing a KeyGenerator instance is done by calling its init() method. Here is an example of initializing a KeyGenerator instance:
The KeyGeneratorinit() method takes two parameters: The bit size of the keys to generate, and a SecureRandom that is used during key generation.
Generating a Key
Once the Java KeyGenerator instance is initialized you can use it to generate keys. Generating a key is done by calling the KeyGeneratorgenerateKey() method. Here is an example of generating a symmetric key: