Abstract: Disclosed herein are embodiments of systems, methods, and products for authentication using entropic threshold. A server may require a user to create a series of security questions to which only the user has the answers. The answers to the security questions may satisfy an entropic threshold. Based on the answers to the security questions, the client device may generate a passphrase and encrypt the user's private key based on the passphrase. The server may also store the encrypted private key and the series of security questions into a database. When the user tries to access the private key, the server may send the user's security questions and encrypted private key. The client device may require the user to provide the answer to each security question. When the client device receives answers to all security questions, the client device may use the resulting passphrase to decrypt the user's encrypted private key.

Abstract: Disclosed herein are embodiments of systems, methods, and products for authentication using entropic threshold. A server may require a user to create a series of security questions to which only the user has the answers. The answers to the security questions may satisfy an entropic threshold. Based on the answers to the security questions, the client device may generate a passphrase and encrypt the user's private key based on the passphrase. The server may also store the encrypted private key and the series of security questions into a database. When the user tries to access the private key, the server may send the user's security questions and encrypted private key. The client device may require the user to provide the answer to each security question. When the client device receives answers to all security questions, the client device may use the resulting passphrase to decrypt the user's encrypted private key.

Abstract: A self-service terminal for a product/service cooperates with an application platform accessible by a consumer's mobile device. The terminal assigns an active status to at least one transaction code for a period of time and compares any code manually entered at the terminal during that time against the active code(s) to dispense the product/service in case of a match. In response to a request from the mobile device, an authorized code is sent from the platform to the mobile device to enable the consumer's manual entry of the authorized code at the terminal.