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动态脱敏用于对数据表中的敏感字段配置脱敏策略。完成配置后，用户使用 Doris、Spark 引擎查询数据时，系统按脱敏规则对查询结果进行动态脱敏，原始数据不发生变化。

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支持范围

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配置字段脱敏

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  1. 登录百度胜算控制台，进入工作空间，在左侧导航栏选择元数据。
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  2. 在数据目录树中找到目标数据表，单击表名进入数据表详情页，默认展示概览页签。
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  3. 在字段信息列表中找到目标字段，在数据脱敏列单击立即配置。
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  4. 在配置对话框中填写配置项，完成后确定。
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表1 数据脱敏配置项说明

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配置项名称说明
脱敏字段显示当前字段名称。
策略名称输入策略名称，支持中文、英文、数值以及 _-./() 特殊字符，长度不超过256个字符。
用户范围下拉选择用户、用户组、全部用户，支持搜索用户名。
算法类型下拉选择算法类型，可选范围根据脱敏字段数据类型决定，全量有哈希、遮掩、截断、变换、加密。
算法名称下拉选择算法名称，根据选择的脱敏算法类型和脱敏字段数据类型选择算法名称。
参数配置根据相应脱敏算法进行参数配置。
脱敏测试输入脱敏测试，单击测试按钮，可进行脱敏测试。测试内容不超过500字符。
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脱敏算法

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表2 算法类型对应项说明

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算法类型算法名称配置参数适用数据类型
哈希SHA256 / MD5 / SHA1 / SM3需配置盐值（不超过128字符）和参数位置（下拉选择 HEAD / TAIL）。字符串类型
iceberg：string
 doris：string、char、varchar
遮掩遮掩前m后n / 保留前m后n / 遮掩自m到n / 保留自m到n需配置 m、n 值，m、n 为 0 或正整数，默认值为 0。字符串类型
iceberg：string
 doris：string、char、varchar
遮掩遮掩全部 / 遮掩邮箱前缀无需配置参数。字符串类型
iceberg：string
 doris：string、char、varchar
截断字符类型截断需配置截断前 m、n 位，m、n 为 0 或正整数，默认值为 0。字符串类型
iceberg：string
 doris：string、char、varchar
截断数值类型截断需配置截断小数点前n位，n为0或正整数，默认值为0。数值类型
iceberg：float、double、decimal
 doris：float、double、decimal
变换数值类型翻倍配置翻倍系数。数值类型
iceberg：int、long、float、double、decimal
 doris：tinyint、smallint、int、bigint、largeint、float、double、decimal
加密AES需配置密钥位数，下拉选择 128 bit / 192 bit / 256 bit。选择位数后，可单击右侧生成密钥按钮生成加密密钥。字符串类型
iceberg：string
 doris：string、char、varchar
加密SM4需配置密钥位数，下拉选择 128 bit。选择位数后，可单击右侧生成密钥按钮生成加密密钥。字符串类型
iceberg：string
 doris：string、char、varchar
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查看、编辑和删除脱敏配置

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在数据表概览页签的字段信息列表中：

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注意：已配置的数据脱敏删除后不可恢复，请谨慎操作。

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