Encrypt and Decrypt string using SQL

Sample Code

 Declare   
 @myData nvarchar(max) = 'My data',  
 @seqKey nvarchar(20) = 'UniQKey07x@a',  
 @encryptedData varbinary(2000)  
 set @encryptedData = EncryptByPassPhrase(@seqKey, @myData)  
 print @encryptedData  
 print convert(nvarchar(max),DecryptByPassPhrase(@seqKey, @encryptedData ))--Decrypted data  

Output

 0x010000008076CB00D6FB7820D77D4B9C3768D596BA1812019E4CFCAEF9B190DAD462A3E3  
 My data