Abstract: There are provided a security server for intermediating transmission/reception of security data between a service providing server and a user terminal, a security data transmission/reception system and a method. In order to intermediate the transmission/reception of security data between the service providing server and the user terminal, the security server may generate a session key corresponding to a secret key provided from a user terminal, receive security data together with the session key from a security data transmitter, encode the security data with the secret key corresponding to the session key, store the encoded security data, provide a data encryption key to the security data transmitter, decode the encoded security data with the secret key corresponding to the session key when the session key is received together with a security data request key from a security data receiver, and provide the decoded security data to the security data receiver.

Abstract: There are provided a security server for intermediating transmission/reception of security data between a service providing server and a user terminal, a security data transmission/reception system and a method. In order to intermediate the transmission/reception of security data between the service providing server and the user terminal, the security server may generate a session key corresponding to a secret key provided from a user terminal, receive security data together with the session key from a security data transmitter, encode the security data with the secret key corresponding to the session key, store the encoded security data, provide a data encryption key to the security data transmitter, decode the encoded security data with the secret key corresponding to the session key when the session key is received together with a security data request key from a security data receiver, and provide the decoded security data to the security data receiver.