Electronic currency offline payment method and payment collection method

An offline electronic currency collection method, comprising:

• controlling, by a second security control module, a second communication module to establish a wireless connection with a first device;
• receiving, by the second security control module, wallet information through the second communication module, wherein the wallet information comprises first device offline account information, a first device available balance and a first device electronic currency, wherein the first device electronic currency at least comprises the following fields:
• a currency denomination, an owner identification, and an issuer signature;
• performing a verification operation and passing of the verification by the second security control module, wherein the verification operation comprises:
• verifying whether the first device offline account information is included in an offline transaction blacklist stored in a second file storage module, verifying whether the first device electronic currency is legal, and verifying whether the first device available balance is smaller than or equal to a total denomination of the first device electronic currency;
• and the passing of the verification comprises:
• verifying that the first device offline account information is not included in the offline transaction blacklist stored in the second file storage module, verifying that the first device electronic currency is legal, and verifying that the first device available balance is smaller than or equal to the total denomination of the first device electronic currency;
• transmitting, by the second security control module after the passing of the verification, collection information to the first device, wherein the collection information at least comprises self offline account information acquired from the second file storage module;
• receiving, by the second security control module, first transaction data through the second communication module, wherein the first transaction data is generated after the first device verifies that the self offline account information is not included in an offline transaction blacklist stored in the first device;
• the first transaction data at least comprises first transaction information and first signature information obtained by digitally signing the first transaction information;
• and the first transaction information at least comprises the first device offline account information, the self offline account information, first transaction time and a first transaction amount;
• and
• verifying, by the second security control module, the first signature information in accordance with the first transaction information and a public key of the first device;
• controlling, by the second security control module in response to passing of the verifying, the second file storage module to set a current in-transit balance to a first balance, and controlling the storage module to store a first transaction record comprising the first transaction data, wherein the first balance is a balance obtained by adding the first transaction amount to an original in-transit balance.