【多选题】
A The BACKUP BACKUPSET command can encrypt and decrypt backup sets
B Image copies can be encrypted
C Backup encryption can be enabled selectively for specific tablespaces
D The Transparent Data Encryption (TDE) keystore is backed up using RMAN
E Vendor-specific media management software can be used for making encrypted RMAN backupsto media
F Keystore-based encryption is the default mode for RMAN backup encryption
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