Transaction method, transaction information processing method, transaction terminal, and server

A transaction method, applied to a transaction terminal having a trusted execution environment (TEE), wherein the transaction terminal comprises a secure function module, a check module and at least one transaction application module, the secure function module runs in the TEE, and the method comprises:

• receiving, by the secure function module, a first transaction message sent by the transaction application module, wherein the first transaction message comprises a first identifier and a secure transaction data requirement parameter, the first identifier is used to identify the transaction application module, and the secure transaction data requirement parameter is used to instruct the secure function module to provide secure transaction data corresponding to the secure transaction data requirement parameter;
• obtaining, by the secure function module, the secure transaction data according to the first transaction message and a second identifier, wherein the second identifier is used to uniquely identify the secure function module;
• sending, by the secure function module, the secure transaction data to the transaction application module;
• processing the secure transaction data through the transaction application module;
• sending, by the transaction application module, a second transaction message to an acquiring terminal, wherein the second transaction message comprises the secure transaction data, the first identifier, and a third identifier, wherein the third identifier is used to identify the transaction terminal;
• performing, by the check module, a security check;
• and
• determining, by the check module, that a result of the security check is success;
• and, wherein before performing the security check, the method further comprises:
• generating, by the transaction application module, the first transaction message;
• and
• determining, by the check module according to the first transaction message, that the security check needs to be performed.