介绍
V$RMAN_ENCRYPTION_ALGORITHMS视图提供了查询数据库中支持的加密算法，RMAN客户端会使用它来验证用户请求的算法。默认的加密算法是AES128。
#视图详情
| 字段名 | 字段类型 | 描述 | 译 | 备注 |
| ALGORITHM_ID | NUMBER | Number to identify the algorithm | 加密算法ID | |
| ALGORITHM_NAME | VARCHAR2(64) | Name of the algorithm (for example, AES128, AES192, or AES256) | 加密算法名称，例如：AES128、AES192、AES256 | |
| ALGORITHM_DESCRIPTION | VARCHAR2(64) | Description of the algorithm | 加密算法的描述信息 | |
| IS_DEFAULT | VARCHAR2(3) | Indicates whether this is the default encryption algorithm (YES) or not (NO). This value is set by Oracle Database and may vary for each Release (that is, it is not dependent on user-specified RMAN configuration). | 加密算法是否为默认，YES-默认加密算法，NO-非默认加密算法 | 值由Oracle数据库设置，每个数据库版本都可以存在差异 |
| RESTORE_ONLY | VARCHAR2(3) | Indicates whether this algorithm can be used for restore only (YES) or not (NO). If the value is NO, then the algorithm is also allowed for backup. This column is useful in determining whether an encryption algorithm is deprecated for backup purpose. | 加密算法是否仅用于恢复数据，YES-仅用于恢复数据，NO-不仅用于恢复数据，还用于备份 |
| 加密算法名称 | 加密算法说明 | 备注 |
| AES128 | AES 128-bit key | |
| AES192 | AES 192-bit key | |
| AES256 | AES 256-bit key |
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