Secure message transmission apparatus and processing method thereof

A method for processing a secure message in a transmission-side terminal, comprising:

• receiving a message as input and encrypting the message by a secure message processor installed in a secure domain based on a secure operating system and physically separated from a non-secure domain based on a non-secure operating system;
• and
• receiving the encrypted message;
• and
• transmitting the encrypted message to a message service apparatus by a non-secure message processor installed in the non-secure domain.

A method for processing a secure message in a reception-side terminal, the method comprising:

• determining, by a non-secure message processor, whether a message transmitted by a message service apparatus is an encrypted message, said non-secure message processor being installed in a non-secure domain which is based on a non-secure operating system and being physically isolated from a secure domain which is based on a secure operating system;
• delivering, by the non-secure message processor, the encrypted message to the secure domain when the transmitted message is the encrypted message;
• receiving and decrypting the encrypted message;
• and
• outputting the decrypted message by a secure message processor installed in the secure domain.

A method for processing a secure message in a message service apparatus, the method comprising:

• receiving a message transmitted by a transmission-side terminal;
• determining, by a non-secure message processor of a non-secure message service unit, whether the message is an encrypted message;
• delivering the encrypted message to a secure processor of a secure message service unit by the non-secure message processor of the non-secure service unit when the message is the encrypted message;
• and
• decrypting the encrypted message, and re-encrypting the decrypted message and transmitting the re-encrypted message to a reception-side terminal, by the secure message processor of the secure message service unit.