The present disclosure relates to a method for providing a remote security service, comprising: providing a screen of a web page being accessed through a remote browser to a user device; monitoring whether an execution event for a context menu included in the web page occurs; encrypting an event constituting the context menu when the execution event occurs; generating a virtualization context menu corresponding to the encrypted event; receiving any one event which is selected from the virtualization context menu; and processing an encrypted work corresponding to the event through the remote browser, and providing the processed, encrypted work to the user device.