def METHOD_NAME(self, payload):
    """Check if payload contains sensitive information."""
    for k in payload:
        # check claims key name
        if k in self.SENSITIVE_NAMES:
            raise InsecureClaimError(k)
        # check claims values
        v = payload[k]
        if isinstance(v, str) and self.SENSITIVE_VALUES.search(v):
            raise InsecureClaimError(k)