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# One-time codes

Streamline entry of authentication and recovery codes.

## Discussion

iOS detects when an SMS message contains a one-time code and offers that code for AutoFill in one-time code fields in apps and websites. Improve the usability of one-time codes in your apps and websites by setting the content type of fields where people enter one-time codes. Improve security by adopting domain-bound codes to make it harder for people to enter one-time codes into phishing websites.

## Topics

### Essentials

[Enabling AutoFill for domain-bound SMS codes](/documentation/Security/enabling-autofill-for-domain-bound-sms-codes)

Streamline entering codes you send as SMS messages.


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