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# Session ID Values

Use these values as placeholders for specific sessions.

## Discussion

You can use these values as the `session` input to the [`SessionGetInfo(_:_:_:)`](/documentation/Security/SessionGetInfo(_:_:_:)) function as a stand-in for specific sessions when you don’t already know the ID for that session. They are *not* returned in the `sessionId` output of that function. Instead, you receive the actual session ID.

## Topics

### Constants

[`var callerSecuritySession: SecuritySessionId`](/documentation/Security/callerSecuritySession)

A value that is a placeholder for the caller’s session.

[`var noSecuritySession: SecuritySessionId`](/documentation/Security/noSecuritySession)

Not a valid session.


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