AUTHENTICATION VECTORS

In one embodiment, a user identifier associated with a user account is received. Indications of a plurality of authentication mechanisms available for authentication are provided for display via the client device. Input indicating a number of authentication mechanisms to be used for authentication in association with the user account is received from the client device, wherein the input includes a selection of one or more of the plurality of authentication mechanisms. Information is stored in association with the user account, where the information indicates the number of authentication mechanisms to be used for authentication in association with the user account and indicates the selected authentication mechanisms. At least a subset of the selected authentication mechanisms are used for authentication in association with the user account.