Abstract: Disclosed is a file security method for reinforcing file security. The method may include: by a first communication device, detecting an access to a file stored in a virtual drive; by the first communication device, requesting a decryption key of the file to a second communication device and receiving the decryption key; and by the first communication device, decrypting the access-detected file by using the decryption key.

Abstract: Disclosed is a file security method for reinforcing file security, which includes: by a first communication device, detecting an access to a file stored in a virtual drive; by the first communication device, requesting a decryption key of the file to a second communication device and receiving the decryption key; and by the first communication device, decrypting the access-detected file by using the decryption key.

Abstract: A network drive system for controlling access to a network drive based on location information on a communication device according to the present technology includes: a storage unit storing a network drive that stores security data and general data; a receiving unit receiving a request for access to the network drive from a first communication device; a location checking unit checking whether the distance between the first communication device and a second communication device designated as a device for controlling access to the network drive is within a critical value; and a policy setting unit that applies a policy allowing the first communication device to access general data stored in the network drive or applies a policy disallowing the first communication device to access general data stored in the network drive, according to results of the determining by the location checking unit.

Abstract: A network drive system for controlling access to a network drive based on location information on a communication device according to the present technology includes: a storage unit storing a network drive that stores security data and general data; a receiving unit receiving a request for access to the network drive from a first communication device; a location checking unit checking whether the distance between the first communication device and a second communication device designated as a device for controlling access to the network drive is within a critical value; and a policy setting unit that applies a policy allowing the first communication device to access general data stored in the network drive or applies a policy disallowing the first communication device to access general data stored in the network drive, according to results of the determining by the location checking unit.