| Attributes | 
| Name | Required | Request-time | Type | Description | 
| captchaSessionKeyName | false | false | javax.el.ValueExpression(must evaluate to
 java.lang.Object) | Determines the CAPTCHA session key name. If
org.apache.myfaces.tomahawk.PREFIX_CAPTCHA_SESSION_KEY is set to true (default),
a prefix defined by the component is added to this key name. | 
| imageWidth | false | false | javax.el.ValueExpression(must evaluate to
 java.lang.Object) | Integer to indicate the CAPTCHA width. default is 290. | 
| imageHeight | false | false | javax.el.ValueExpression(must evaluate to
 java.lang.Object) | Integer to indicate the CAPTCHA height. default is 81. | 
| id | false | true | java.lang.String | Get a string which uniquely identifies this UIComponent within the scope of the nearest ancestor NamingContainer
component. The id is not necessarily unique across all components in the current view. | 
| rendered | false | false | javax.el.ValueExpression(must evaluate to
 boolean) | A boolean value that indicates whether this component should be rendered.
Default value: true. | 
| binding | false | false | javax.el.ValueExpression(must evaluate to
 javax.faces.component.UIComponent) | Identifies a backing bean property (of type UIComponent or appropriate subclass) to bind to this component instance. This value must be an EL expression. |