Abstract: The present disclosure relates to a polymer composite and a molded article containing the disclosed polymer composite. According to the present disclosure, there is provided a polymer composite capable of exhibiting excellent mechanical properties while simultaneously being environmentally friendly by containing cellulose fibers as a reinforcing material of the polymer composite.

Abstract: Provided is a method of transmitting and receiving a message using an encryption/decryption key, by which each of a sender and a recipient can generate an encryption/decryption key and recover a key used for encryption/decryption while transmitting and receiving the message using an electronic device. The method includes: (a) a user generating his/her own private key and a public key, registering the public key with a key recovery agent (KRA), and setting shared secret information; and (b) a sender transmitting the recovery information necessary for decryption of the transmission message to a recipient, and the recipient generating a key necessary for the decryption from the recovery information and decrypting the transmission message. The method may further include the recipient requesting recovery of the session key to the KRA.

Abstract: Provided is a method for analyzing a network attack situation. The method categorizes network intrusion detection alerts into network attack situations, counts the frequency of same-featured intrusion alert occurrence for each network attack situation using a counting algorithm based on time slots, and analyzes the network attack situation based on the frequency of same-featured intrusion detection alert occurrence, the rate of same-featured intrusion detection alert occurrence, or an AND/OR combination of them. The network attack situation can be correctly detected in real time without relatively being influenced by the size of the network or amount of the occurrence of the intrusion detection alerts.

Abstract: A method for electronic commerce using a security token and an apparatus thereof are provided. The electronic commerce method using a security token comprises a transaction approval institution generating a security token based on a security assertion markup language (SAML), using credit information of a purchaser who requests to issue a security token, and transmitting the security token to the purchaser; the purchaser writing an electronic signature on an order and transmitting the order together with the security token to a seller; the seller verifying the received order and security token, and then delivering goods according to the order to the purchaser; and the transaction approval institution performing payment for the seller and the purchaser. The method can solve the problems of personal information leakage and privacy infringement that may happen when a purchaser sends his personal information to a seller for electronic commerce.