Abstract: In response to an inquiry by an unsophisticated Subscriber over a nonsecure network, a Provider returns a public key and retains the corresponding private key. The Subscriber encrypts a password using the public key, which is decrypted by the Provider. The password is then used to securely transfer to the Subscriber a key determined by the Provider, thereby enabling the Subscriber to decrypt messages encrypted by the Provider and transmitted over the nonsecure network. This password dependent secure transmission of a key to an unsophisticated Subscriber may be accomplished by several methods, including hashing, key lookup, Wizard protocol, and Warlock procedure. In each method the password is used by the Subscriber and the Provider in correlated operations ending in secure receipt by the Subscriber of a key determined by the Provider.

Abstract: In response to an inquiry by an unsophisticated Subscriber over a nonsecure network, a Provider returns a public key and retains the corresponding private key. The Subscriber encrypts a password using the public key, which is decrypted by the Provider. The password is then used to securely transfer to the Subscriber a key determined by the Provider, thereby enabling the Subscriber to decrypt messages encrypted by the Provider and transmitted over the nonsecure network. This password dependent secure transmission of a key to an unsophisticated Subscriber may be accomplished by several methods, including hashing, key lookup, and Wizard protocol. In each method the password is used by the Subscriber and the Provider in correlated operations ending in secure receipt by the Subscriber of a key determined by the Provider.

Abstract: In the making of fixed dental prosthesis, a model is employed, which is an accurate replica of the patient's teeth and gums. For reinforcement, the model is fixed to a base. A model comprises a replica of the teeth remaining in the patient's mouth and a replica of teeth to be prepared by restorative dentistry. For preparing the teeth by restorative dental techniques, a die is used. It is desired that the die be removed from and replaced in the model with facility, be indexed accurately relative to the model and have stability while positioned in the model against forces applied in the practice of prosthesis, and also be removable from the base on which the model is secured. Toward this end, a pin is fixed in the die having a locating leg and an indexing leg interconnected by an arcuate portion of the pin. The legs extend outwardly from the die to be received by the base to which the model is secured.

Abstract: In the making of fixed dental prothesis, a model is employed, which is an accurate replica of the patient's teeth and gums. For reinforcement, the model is fixed to a base. A model comprises a replica of the teeth remaining in the patient's mouth and a replica of teeth to be prepared by restorative dentistry. For preparing the teeth by restorative dental techniques, a die is used. It is desired that the die be removed from and replaced in the model with facility, be indexed accurately relative to the model, and have stability while positioned in the model against forces applied in the practice of prothesis, and also be removable from the base on which the model is secured. Toward this end, a pin is fixed in the die having a locating leg and an indexing leg interconnected by an arcuate portion of the pin. The legs extend outwardly from the die to be received by the base to which the model is secured.