Abstract: Provided are a computer program product, method and system for dynamically providing algorithm-based password/challenge authentication. A page is provided to authenticate a presenter of a username including a string and a field for entry of a password. An entered password entered into the page is received. An algorithm associated with the username is applied to the string included in the page to generate a generated password. A determination is made as to whether the entered password matches the generated password. The username is successfully authenticated in response to determining that the entered password matches the generated password.

Abstract: Provided are a computer program product, method and system for dynamically providing algorithm-based password/challenge authentication. A page is provided to authenticate a presenter of a username including a string and a field for entry of a password. An entered password entered into the page is received. An algorithm associated with the username is applied to the string included in the page to generate a generated password. A determination is made as to whether the entered password matches the generated password. The username is successfully authenticated in response to determining that the entered password matches the generated password.

Abstract: Provided are a computer program product, method and system for dynamically providing algorithm-based password/challenge authentication. A page is generated including selectable conversion operators to enable generation of an algorithm that applies at least one selected conversion operator of the selectable conversion operators on a string to generate a password. A created algorithm created using the at least one selected conversion operator in the page is received. The created algorithm is associated with a username for use in authenticating access by a presenter of the username to a computer service.