We can easily enable the encryption using wizard which you can check it here.
Disabling the encryption is also an easy task through wizard.
Steps to disable the encryption,
Step 1: Right Click on your database and choose Tasks->Encrypt Columns..
Step 2: Select next on the introduction page.
Step 3: When you are enter into column selection page, you can see the lock symbol on the columns which you enabled the encryption. Under encryption type, you can see the drop down values which includes “Plaintext”, “Deterministic” & “Randomized”. Choose the “Plaintext” and proceed next.
Step 4: Go through further steps and finish it.
Step 5: Now, run the select statement on table and you should see the result without an encryption.
We can define the “Encryption Key” & “Master key” Name manually.
Follow the steps to create custom names and to make use for encryption.
Step 1: Go to Security folder of your database.
Step 2: Expand the security folder and you should see the folder called “Always Encrypted Keys”. Expand the folder.
Step 3: You should see another two folders, Column Master Keys & Column Encryption Keys. Right click on Column Master Keys folder and choose “New Column Master Key..”
Step 4: Define the name of the master key and choose the key store where you want to store your key safely and click OK. Master will be created.
Step 5: Right click on Column Encryption Keys folder and choose “New Column Encryption Keys”
Step 6: Give the name and choose the master key from drop down. You should see the master key which you created in above step 4 and click OK.
Step 7: Now, go and create an encrypted column and you should see the option to choose your encryption key. Master key also will be applied automatically.