Abstract: The invention is a first body and a second body, the first body includes a first magnetic element such as a coin shaped neodymium magnet, the second body includes a second magnetic element such as a steel disk or a coin shaped neodymium magnet so that the first body can be attracted to the second body by magnetic forces, the first body having an aperture therethrough. A method for custom camouflaging the exterior sheet material of a hunting blind using the apparatus of the instant invention. A method for suspending an article in a hunting blind using the apparatus of the instant invention.

Abstract: A social CAPTCHA is presented to authenticate a member of the social network. The social CAPTCHA includes one or more challenge questions based on information available in the social network, such as the user's activities and/or connections in the social network. The social information selected for the social CAPTCHA may be determined based on affinity scores associated with the member's connections, so that the challenge question relates to information that the user is more likely to be familiar with. A degree of difficulty of challenge questions may be determined and used for selecting the CAPTCHA based on a degree of suspicion.

Abstract: A social CAPTCHA is presented to authenticate a member of the social network. The social CAPTCHA includes one or more challenge questions based on information available in the social network, such as the user's activities and/or connections in the social network. The social information selected for the social CAPTCHA may be determined based on affinity scores associated with the member's connections, so that the challenge question relates to information that the user is more likely to be familiar with. A degree of difficulty of challenge questions may be determined and used for selecting the CAPTCHA based on a degree of suspicion.