Abstract:
사용자와 특정 시간의 네트워킹 행위에 관한 동시 공증을 통하여 사용자 인증과 트래픽 인증을 대신하고 한 번의 시도로 여러 개의 방화벽을 동시에 동적으로 통과할 수 있는 다중 방화벽 동적 통과 방법이 개시된다. 다중 방화벽 동적 통과 방법은 약속된 절차에 의해 사용자 서버와 응용 서버가 TCP/IP의 3-wqy 핸드쉐이킹 과정 중에서 2번째 과정 까지를 시뮬레이션하고 정해진 시각에서 3번째의 과정이 수행될 수 있게 한다. 약속된 절차는 공증 서버에서 발행한 공증서에 근거하여 발생된다.
Abstract:
PURPOSE: A method for authenticating one time password and an apparatus thereof are provided to use a one time password without a hardware device for producing the one time password. CONSTITUTION: A table for inputting one time password is generated by a security server. The security server generates and verifies a table for inputting one time password by using a PIN(Personal Identification Number) of a user. The security server draws out the PIN number of the user(S202). User information is informed to the security server by a security client. The security server generates the table by using a drawn PIN number(S204). A generated table is transmitted(S206).
Abstract:
본 발명의 일 실시예는 데이터 암호화에 사용될 암호키를 생성하는 단계; 성가 생성한 암호키를 이용하여 데이터를 암호화하는 단계; 상기 암호키를, 상기 암호키의 복원에 필요한 가중키조각 및 적어도 하나 이상의 암호키조각으로 분리하는 단계; 및 상기 분리된 가중키조각 및 상기 적어도 하나 이상의 암호키조각을 각각 저장하기 위해 전송하는 단계를 포함하는 데이터 암호 방법을 제공한다.
Abstract:
Disclosed is a method for dynamically traversing multiple firewalls, in which user authentication and traffic authentication are replaced by the simultaneous authentication of a user and networking behavior conducted at a specific time to simultaneously and dynamically traverse multiple firewalls through one trial. The method for dynamically traversing multiple firewalls enables a user server and an application server to simulate first and second processes from among three-way handshaking processes of TCP/IP in accordance with an agreed procedure, and perform a third process of the three-way handshaking process at a predetermined time. The agreed procedure is generated on the basis of an authentication certificate issued by an authentication server.
Abstract:
PURPOSE: A system and a method for sharing lifelike media are provided to share high quality lifelike media of VP(Video Presence), thereby providing environment with reality and immersion. CONSTITUTION: A reality media generation device(100) assigns same multicast address and each different port number photographed by a plurality of photographing units(110). The reality media generation device transmits a SDP(Session Description Protocol) message to a plurality of clients(200). At least one of clients extract service attribute information through analysis of the SDP message of the reality media generation device. The client outputs an image of a selected photographing unit or a multi view image of a plurality of photographing units.
Abstract:
PURPOSE: A device for coding or decoding data and a method thereof are provided to solve complexity and inefficiency of management of a coding key. CONSTITUTION: A device for coding and decoding data generates a coding key which is used for data coding(S210). The device codes data by using the generated coding key(S220). The device divides the coding key into weighted key pieces, which is necessary for reconstitution of the coding key, and one or more coding key pieces(S230). The device transmits a divided weighted key piece and one or more coding key piece to a weighted key piece storage unit and a coding key piece storage unit, respectively(S240). [Reference numerals] (S210) Generate a coding key which is used for data coding; (S220) Code data by performing a data coding process using the generated coding key; (S230) Divide the coding key used for data coding according to one or more piece keys and weighted keys to be used for decoding; (S240) Transmit the divided coding key pieces to each coding key piece storage unit and transmits the selected weighted key to a weighted key piece storage unit
Abstract:
Disclosed are a system and a method for controlling a data transmission adapted for a grid computing and a computer readable recording medium of recording a process thereof, in which efficiently perform a grid computing using an ultrahigh speed communication network from an ultrahigh speed communication network in a non-congestion state to a communication network in a congestion state. TCP state information-providing section stores and provides TCP state information of a network. TCP state information-initializing section initializes TCP state information. Transmission mode-judging section judges a transmission mode of data to be transmitted according to the TCP state information. Packet processor generates and transmits traffic corresponding to each transmission mode classified according to the judgment result from transmission mode-judging section.
Abstract:
PURPOSE: A data transmission control system suitable for grid computing, method therefor and a recording medium for reading a computer storing process of the same are provided to enhance transmission capability in high speed communication network and grid network environment by adopting a virtual buffer concept. CONSTITUTION: A TCP state information initializing unit initializes TCP state information by using a pre-set initial value(S100). A transmission mode determining unit determines a transmission mode of data based on the TCP state information(S120). The transmission mode determining unit checks whether the data transmission mode is an initial mode(S130). If it is not the initial mode, the transmission mode determining unit checks whether a CWND(transmittable window) is greater than an RWND(Receive Window)(S140). If so, the transmission mode determining unit checks whether an SWND(Send Window) is the same as the RWND(S150). The transmission mode determining unit checks whether the SWND is the same as or greater than the RWND and smaller than four times a reference point(SSTHRESH) indicating start of congestion(S160). If not, the transmission mode determining unit checks whether the SWND is greater than or the same as four times the reference point or smaller than eight times the reference point(S170), it transmits data at a high speed(S180). The transmitted data is uniformly distributed and transmitted(S190). The uniformly distributed data is fully delayed(S200). It is determined whether a packet of the data has been lost(S210). The reference point is reset to half of the SWND(S220).
Abstract:
The present invention relates to a method for partially encrypting data, an apparatus thereof, a storage medium for storing a program partially encrypting data, a method for decrypting partially-encrypted data, an apparatus thereof and a storage medium for storing a program decrypting partially-encrypted data. According to an embodiment of the present invention, a method for partially encrypting data is provided. The method comprises the steps of: initializing a random generator with an initial value; creating random numbers by the random generator; matching a data block to be encrypted with a partial digit string included in the created random number sequence and, when the partial digit string is identical to a digit string on a predefined truth table, encrypting the matched data block according to encryption information corresponding to the same digit string on the truth table; and outputting the encrypted data block.