Korea University Research and Business Foundation

Seounghwan Oh

Hwangnam Kim

Seongjoon Park

Seong-joon Park

Disclosed is a method for trading private information access rights based on a distributed ledger, performed by a distributed network system including a plurality of distributed servers to perform authentication and store a token, the method including giving rights to use the token to a buyer terminal by performing authentication upon receiving a token trade request, permitting a service application server to use the token by performing authentication upon receiving a token usage request, providing, by the service application server, a predefined service by using the token and broadcasting usage detail of the token to the distributed network system, and updating, by the distributed server, the usage detail of the token.

Method for providing services requiring private information using access rights in distributed network and recording medium for performing the method

The present disclosure relates to a block cipher apparatus and method for real-time data transmission and the block cipher apparatus according to an exemplary embodiment of the present disclosure includes: a block encryption unit which selects a key in accordance with an order of keys having different lengths to encrypt each plaintext block and generate a ciphertext block; and a message authentication unit which generates a message authentication code using a key selected at the time of encrypting a current plaintext block which is encrypted in the block encryption unit and a previous message authentication code generated by a plaintext block before the current plaintext block.

Growing community of inventors

Seongnam-si, South Korea

Seounghwan Oh