| 摘要 |
To improve security of operations in a communication network such as Internet, a database containing a plurality of icons is stored in the installation program of a browser. When executing the installation program, an icon in the icon database is selected. The selected icon is stored in a storage unit which is inaccessible by any device other than the browser. The selected icon is displayed when executing the browser, and it is assigned a feature to indicate whether the current operation is secure.
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