SQL Server TDE encrypting Master Database
in TDE implimentation (MSSQL user databases are encrypted) and TempDB are partially encrypted whenever one database is being encrypted using TDE.
There is a security weakness in the current setup of TDE, the MASTER database should be encrypted through TDE also. MASTER database holds a lot of critical information such as login passwords, the certificate,....etc.
SO, TDE implementation should cover MASTER system database to strengthen the security implementation.