A method comprising: receiving a registration request from a current user, wherein the registration request comprises a login name main part; determining, in a database, whether the login name main part comprised in the registration request conflicts with a conflicting login name main part for a conflicting user; in response to a determination that the login name main part comprised in the registration request conflicts with the conflicting login name main part, executing a login password differentiation process, comprising: creating a user record associated with a registration of the current user, the user record for the current user comprising a login name field, wherein: the login name field comprises the login name main part; a conflict identification parameter is introduced to the login name main part of the current user; and the conflict identification parameter is used to ensure uniqueness with respect to the login name main part received from the current user; and enforcing a password differentiation between a password corresponding to the conflicting user and a login password input by the current user, comprising: performing a refuse registration guidance mode operation, the refuse registration guidance mode operation comprising causing the current user to attempt registration with a different corresponding login password a set number of times before allowing the current user to successfully register, the set number of times being a randomly selected integer; and storing the different login password in connection with a registration of the current user. receiving a registration request from a current user, wherein the registration request comprises a login name main part; determining, in a database, whether the login name main part comprised in the registration request conflicts with a conflicting login name main part for a conflicting user; in response to a determination that the login name main part comprised in the registration request conflicts with the conflicting login name main part, executing a login password differentiation process, comprising: creating a user record associated with a registration of the current user, the user record for the current user comprising a login name field, wherein: the login name field comprises the login name main part; a conflict identification parameter is introduced to the login name main part of the current user; and the conflict identification parameter is used to ensure uniqueness with respect to the login name main part received from the current user; and enforcing a password differentiation between a password corresponding to the conflicting user and a login password input by the current user, comprising: performing a refuse registration guidance mode operation, the refuse registration guidance mode operation comprising causing the current user to attempt registration with a different corresponding login password a set number of times before allowing the current user to successfully register, the set number of times being a randomly selected integer; and storing the different login password in connection with a registration of the current user. creating a user record associated with a registration of the current user, the user record for the current user comprising a login name field, wherein: the login name field comprises the login name main part; a conflict identification parameter is introduced to the login name main part of the current user; and the conflict identification parameter is used to ensure uniqueness with respect to the login name main part received from the current user; and enforcing a password differentiation between a password corresponding to the conflicting user and a login password input by the current user, comprising: performing a refuse registration guidance mode operation, the refuse registration guidance mode operation comprising causing the current user to attempt registration with a different corresponding login password a set number of times before allowing the current user to successfully register, the set number of times being a randomly selected integer; and the login name field comprises the login name main part; a conflict identification parameter is introduced to the login name main part of the current user; and the conflict identification parameter is used to ensure uniqueness with respect to the login name main part received from the current user; and enforcing a password differentiation between a password corresponding to the conflicting user and a login password input by the current user, comprising: performing a refuse registration guidance mode operation, the refuse registration guidance mode operation comprising causing the current user to attempt registration with a different corresponding login password a set number of times before allowing the current user to successfully register, the set number of times being a randomly selected integer; and storing the different login password in connection with a registration of the current user.