Data transmitting method suitable to client and server, data transmitting system and data transmitting method for client suitable to transmit and receive data to and from server

A data transmitting system, comprising:

• a client, generating an initial value;
• and
• a server, generating a first time in response to the initial value;
• wherein, the client generates a second time and a first verification hash code in response to the first time, wherein the first verification hash code is related with the first time and the second time;
• wherein, the server generates a random variable and a second verification hash code in response to the second time and the first verification hash code, wherein the second verification hash code is related with the first time, the random variable and the first verification hash code;
• wherein, the client generates a first transmitting data and a third verification hash code in response to the random variable and the second verification hash code, wherein the third verification hash code is related with the first transmitting data, the first verification hash code and the second verification hash code;
• and
• wherein, the server generates a first response message and a fourth verification hash code in response to the first transmitting data and the third verification hash code, wherein the fourth verification hash code is related with the first response message, the second verification hash code and the third verification hash code.

A data transmitting method for a client, suitable to transmit and receive data to and from a server, the method comprising:

• generating an initial value;
• generating a second time and a first verification hash code according to a first time is transmitted from the server in response to the initial value, wherein the first verification hash code is related with the first time and the second time;
• and
• generating a first transmitting data and a third verification hash code according to a random variable and a second verification hash code are transmitted from the server in response to the second time and the first verification hash code, wherein the second verification hash code is related with the first time, the random variable and the first verification hash code, and the third verification hash code is related with the first transmitting data, the first verification hash code and the second verification hash code.