Understanding Column-level Security | Snowflake Documentation
docs.snowflake.com/en/user-guide/security-column-intro
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Column-level Security in Snowflake allows the application of a masking policy to a column within a table or view.
Dynamic Data Masking is a Column-level Security feature that uses masking policies to selectively mask plain-text data in table and view columns at query time. External Tokenization enables accounts to tokenize data before loading it into Snowflake and detokenize the data at query runtime. Tokenization is the process of removing sensitive data by replacing it with an undecipherable token. External Tokenization makes use of masking policies with external functions.
A masking policy consists of a single data type, one or more conditions, and one or more masking functions.
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