METHOD AND SYSTEM FOR STORING INFORMATION BY USING TCP COMMUNICATION

摘要

The present invention relates to a method and system for storing information by using TCP communication. The method of the present invention includes: activating, at a client, an SYN region of a header of a TCP packet to request a TCP communication connection with a server, generating a random number, and transmitting, to the server, a first TCP packet that includes the generated number in an SEQ region of the header of the TCP packet; encrypting, at the server, at least one piece of information to be stored in the first TCP packet; activating, at the server, the SYN region of the header of the TCP packet, storing encrypted information in the SEQ region of the header of the TCP packet, and transmitting, to the client, a second TCP packet storing, in an ACK region of the header of the TCP packet, a value derived by adding 1 to the random number in the SEQ region of the first TCP packet; activating, at the client, the ACK region of the header of the TCP packet, storing, in the SEQ region of the header of the TCP packet, a value that is derived by adding 1 to the random number stored in the SEQ region of the header of the first TCP packet, and transmitting, to the server, a third TCP packet that includes a value derived by adding 1 to the encrypted information in the ACK region of the header of the TCP packet; decrypting, at the server, the ACK region of the header of the third TCP packet to obtain encrypted information; and if it is determined through comparison that information stored in an IP packet present on a lower level of the second TCP packet is the same as a value that is derived by subtracting 1 from a value obtained from the ACK region of the header of the third TCP packet, determining that the information has been stored in the SEQ region of the second TCP packet and the ACK region of the third TCP packet.