MySQL 默认情况下是否对静态数据应用加密？
Does MySQL apply Encryption for Data at Rest by default?
我经历了 this page of MySQL Doc。对于 MySQL v8.0.x，文件系统中存储的数据（主要是 .ibd 文件）是否默认加密，我仍然不清楚？我在表空间上看到一堆信息：
The mysql system tablespace contains the mysql system database and MySQL data dictionary tables. It is unencrypted by default.
是否也意味着存储的数据默认没有加密？谁能帮我指出官方文档是怎么说的？
是的，默认情况下数据未加密。
在 MySQL 8.0.16 之前，您必须明确设置加密才能启用它，例如参见对于 File-Per-Table Tablespace Encryption:
Prior to MySQL 8.0.16, the ENCRYPTION clause must be specified to enable encryption.
这当然意味着如果你不指定它，它默认是禁用的。
自 MySQL 8.0.16 起，行为 is inherited:
As of MySQL 8.0.16, the default_table_encryption system variable defines the default encryption setting for schemas and general tablespaces. CREATE TABLESPACE and CREATE SCHEMA operations apply the default_table_encryption setting when an ENCRYPTION clause is not specified explicitly.
By default, a table inherits the encryption setting of the schema or general tablespace it is created in. For example, a table created in an encryption-enabled schema is encrypted by default. This behavior enables a DBA to control table encryption usage by defining and enforcing schema and general tablespace encryption defaults.
但是 default_table_encryption 的默认值是 off:
Default Value OFF
Defines the default encryption setting applied to schemas and general tablespaces when they are created without specifying an ENCRYPTION clause.
The default_table_encryption variable is only applicable to user-created schemas and general tablespaces. It does not govern encryption of the mysql system tablespace.
请注意，如果您更改默认值，现有对象将不会自动加密，您必须明确更改它们。
我经历了 this page of MySQL Doc。对于 MySQL v8.0.x，文件系统中存储的数据（主要是 .ibd 文件）是否默认加密，我仍然不清楚？我在表空间上看到一堆信息：
The mysql system tablespace contains the mysql system database and MySQL data dictionary tables. It is unencrypted by default.
是否也意味着存储的数据默认没有加密？谁能帮我指出官方文档是怎么说的？
是的，默认情况下数据未加密。
在 MySQL 8.0.16 之前，您必须明确设置加密才能启用它，例如参见对于 File-Per-Table Tablespace Encryption:
Prior to MySQL 8.0.16, the ENCRYPTION clause must be specified to enable encryption.
这当然意味着如果你不指定它，它默认是禁用的。
自 MySQL 8.0.16 起，行为 is inherited:
As of MySQL 8.0.16, the default_table_encryption system variable defines the default encryption setting for schemas and general tablespaces. CREATE TABLESPACE and CREATE SCHEMA operations apply the default_table_encryption setting when an ENCRYPTION clause is not specified explicitly.
By default, a table inherits the encryption setting of the schema or general tablespace it is created in. For example, a table created in an encryption-enabled schema is encrypted by default. This behavior enables a DBA to control table encryption usage by defining and enforcing schema and general tablespace encryption defaults.
但是 default_table_encryption 的默认值是 off:
Default Value OFF
Defines the default encryption setting applied to schemas and general tablespaces when they are created without specifying an ENCRYPTION clause.
The default_table_encryption variable is only applicable to user-created schemas and general tablespaces. It does not govern encryption of the mysql system tablespace.
请注意，如果您更改默认值，现有对象将不会自动加密，您必须明确更改它们。