（多选题）
Which two statements are true about encrypting RMAN backup？（）
A The transparent encryption of backups uses the encryption wallet
B The database uses the same encryption key for every encrypted backup
C The password encryption of backups only uses the password while creating and restoring backup
D If transparent encryption is configured， you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups
正确答案
答案解析
略
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