Information transmission method, system and data card

An information transmission system, comprising:

• a sending device, which is configured to scramble original information in a predetermined scrambling way, and send scrambled information to a terminal device;
• and
• the terminal device, which is configured to receive the scrambled information, and descramble the scrambled information in a predetermined descrambling way to obtain the original information;
• wherein the predetermined scrambling way corresponds to the predetermined descrambling way.

A data card, comprising:

• an obtaining module, which is configured to obtain a clear stream;
• a scrambling processing module, which is configured to scramble the clear stream in a predetermined scrambling way to obtain a scrambled stream;
• and
• a sending module, which is configured to send the scrambled stream to a terminal device, so that the terminal device descrambles the scrambled stream in a predetermined descrambling way to obtain the clear stream;
• wherein the predetermined scrambling way corresponds to the predetermined descrambling way.