To provide a method for accessing plural sites with single user password, by which the security is improved by registering different access passwords to respective sites while using only one user password of a user and by safely performing access by using these different access passwords.
When accessing plural centers A, B and C from a user terminal, identification information Const-A, B and C of respective centers is acquired and a user password passwd of the user terminal and identification information Const-i of respective centers are converted to access passwords passwd-A, B and C capable of unique identification for every center by mapping conversion. Then, this converted access password passwd-1 is registered for every center and when the user terminal is to access each of centers, each of centers is accessed by using the registered access password passwd-i for each center.
MUTO YUTAKA
OGIWARA TOSHIHIKO
