> For the complete documentation index, see [llms.txt](https://docs.tonic.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tonic.ai/app/generation/generators/generator-reference/ssn.md). # SSN Generates a new valid United States Social Security Number. You specify the percentage of values for which to include the dashes. For columns that have a numeric data type, Structural automatically excludes the dashes. ## Characteristics


Consistency	Yes, can be made self-consistent or consistent with another column.
Linking	No, cannot be linked.
Differential privacy	Yes, if consistency is not enabled.
Data-free	Yes, if consistency is not enabled.
Allowed for primary keys	No
Allowed for unique columns	No
Uses format-preserving encryption (FPE)	No
Privacy ranking	1 if not consistent 4 if consistent
Generator ID (for the API)	`SsnGenerator`

## How to configure To configure the generator: 1. In the **Percent with -'s** field, type the percentage of output values for which to include dashes in the format.\ \ For example, if you set this to `60`, then 60% of the output values are formatted `123-45-6789`, and 40% are formatted `123456789`.\ \ If you set this to `100`, then all of the output values are formatted `123-45-6789`.\ \ If you set this to `0`, then all of the output values are formatted `12345679`.\ \ For columns that have a numeric data type, Structural automatically generates the output values without dashes. 2. Toggle the **Consistency** setting to indicate whether to make the generator consistent.\ \ By default, consistency is disabled. 3. If you enable consistency, then by default the generator is self-consistent.\ \ To make the generator consistent with another column, from the **Consistent to** dropdown list, select the column.\ \ When a generator is self-consistent, then a given value in the source database is always mapped to the same value in the destination database.\ \ When a generator is consistent with another column, then a given value for that other column in the source database results in the same SSN in the destination database. For example, if the SSN column is consistent with a Name column, then every instance of John Smith in the source database results in the same SSN in the destination database. 4. If [Structural data encryption](/app/generation/generators-assign-config/generators-data-encryption-config.md) is enabled, then to use it for this column, in the advanced options section, toggle **Use data encryption process** to the on position. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.tonic.ai/app/generation/generators/generator-reference/ssn.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.