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1Password 3

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# OS X Login Keychain

The Mac OS X keychain is a system-wide service that can be used by applications to protect their data.

1Password uses the login keychain to store some of its data:

- Access Codes: Only stored if specified, this is the access code you provided when exporting data to an iPhone Safari Bookmark or syncing to a Palm device.
- Master Password: Only stored if you enable the option, this is your 1Password Master Password.

This information is stored in the login keychain instead of the 1Password data file because 1Password needs to access it even when its own data file is locked.

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