# encrypt_security_field

The `encrypt_security_field` method returns the encrypted form of the supplied ACL string.

This function is similar to the encrypt function, but is intended for use with Access Control Lists (ACLs). The function encrypts user and group names, but not delimiters such as `:U:`,`:NU:`, and the commas in comma-separated lists of users and groups.

## Syntax

    encrypt_security_field( acl )

## Arguments

Argument | Description
--- | ---
`acl` | (string) An Access Control List string.

## Returns

(String). An encrypted string.

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