Abstract:
아이디 기반 암호화, 복호화 방법 및 이를 수행하기 위한 장치가 개시된다. 본 발명의 일 실시예에 따른 아이디 기반 암호화 방법은, 송신 단말에서, 키 발급 서버로부터 송신측 아이디에 대응되는 송신측 개인키(a)를 발급받는 단계; 상기 송신 단말에서, 상기 송신측 아이디, 수신측 아이디 및 상기 송신측 개인키를 이용하여 세션키(S)를 생성하는 단계; 상기 송신 단말에서, 상기 세션키의 적어도 일부로부터 비밀키를 추출하는 단계; 및 상기 송신 단말에서, 기 설정된 암호화 알고리즘 및 상기 비밀키를 이용하여 메시지를 암호화하는 단계를 포함한다.
Abstract:
송신자가 수신자에게 전송하는 파일의 파일명의 일부 또는 확장자로서, 상기 송신자 ID 또는 수신자 ID를 사용하는 아이디 기반 처리 모듈을 포함하는 단말기가 개시된다. 이로써, 사용자로 하여금 육안으로도 보안이 적용된 파일임을 인식할 수 있게 하고, 확장자에 대해 연결 프로그램의 지정이 가능하여 사용자가 파일을 복호화하거나 검증할 때 지정된 연결 프로그램을 통해 손쉽게 이용할 수 있다.
Abstract:
When a certain user performs selection, information regarding a trust relationship affected by other user′s opinion, namely, having dependence on a behavior of other user, is applied to a recommendation system. A method for social recommendation according to the present invention comprises steps of mapping a user and an item to form a user-item matrix; calculating a Jaccard coefficient with respect to the user, determining that there is a social relationship when the calculated Jaccard coefficient is equal to or greater than a predetermined threshold value, and increasing a social link; and adding the increased social link to the user-item matrix. Similarity is evaluated by using a person coefficient correlation method, and the social link may be increased in further consideration of the evaluated similarity.
Abstract:
The present invention provides an apparatus and a method for analyzing traffic. The apparatus for analyzing the traffic according to an aspect of the present invention comprises; a selecting part for separately selecting initial N bytes from a payload of multiple flow packets; a generating part for generating numerical flow information for each flow packet using features of each flow packet; and a learning part for performing machine learning for the separately selected initial N bytes and the generated numerical flow information, and determining classification criteria of the traffic according to the learning result.
Abstract:
Disclosed are encryption and decryption method and signature method based on a private key generation method. An arbitrary random value (r) is selected, a message is encrypted and an encrypt (U, V)(U = g^r, V = m·(S_UID)^r) generated and transmitted by using a user ID (U_ID), which receives an encrypted message, as a public key. The message is decoded using a private key (sk_UID,) corresponding to the U_ID which received the encrypted message. According to the present invention, a client stage is lightened, and the efficiency of private key generation is improved by layering a generation unit. Also, the layered private key generation unit is able to be applied to various fields by appropriately mixing the layered private key generation unit. [Reference numerals] (110) Root private key generation unit;(120) Sub private key generation unit;(AA) Parameter = (N, G, g, H);(BB) Root master key (mk_Root) = (p,q);(CC) Parameter = (G_ID, n, H^I,(g_1,g_2,···,g_n)) (But, g_i = H(G_ID, i)), a first sub master key set (mk_G_ID) = (x_1,x_2,···,x_n) (But, g_i = g^x_i);(DD) User (U_i) → H^I(U_i) = b_i1 || b_i2 || ··· || b_in, user (U_i) private key (sk_ui) = 誇^n_j=1 � _jb_ij;(EE) User 1 (u_1);(FF) User 2 (u_2);(GG) User n (u_n);(HH) User x (u_x)
Abstract:
PURPOSE: An apparatus and a method for generating a secret key, and a recording medium storing a program for executing the method of the same in a computer are provided to facilitate lightweight clients and efficiency in generation of secret keys. CONSTITUTION: An apparatus for generating a secret key comprises a root secret key generator (110) and a sub secret key generator (120). The root secret key generator generates a first sub master key set that generates secret keys as many as a restricted preset number by setting a root master key and predetermined parameters enabling generation of secret keys. The sub secret key generator shares a privilege to generate secret keys with the root secret key generator, by receiving the first sub master key set form the root secret key generator. The sub secret key generator generates a secret key corresponding to a user ID using the first sub master key set and issues the generated secret key to a user. [Reference numerals] (110) Root secret key generator; (120) Sub secret key generator (G_ID); (AA) Parameter = (N,G,g,H); (BB) Root master key (mk_Root) = (p,q); (CC) Parameter = (G_ID, n, H^1, (g_1, g_2,···,g_n)) (But, g_1= H(G_ID, i)); (DD) First sub master key set (mk_G_ID) = (x_1, x_2, ···, x_n) (But, g_i=g^x_i); (EE) User (u_1); (FF) User (u_2); (GG) User (U_1)→H^1(U_1) = b_i1 b_i2 ··· b_in; (HH) User (U_1) secret key (sk_UI)=Σ^n_j=1 x_j b_ij; (II) User n(u_n); (JJ) User x(u_x)
Abstract:
아이디 기반 암호화 및 서명 장치 및 방법이 제공된다. 아이디 기반 암호화 및 서명 장치의 암호화부는 제1파일을 수신할 수신자의 ID(identification)가 입력되면, 수신자의 ID를 공개키로서 이용하여 상기 제1파일을 암호화하고, 파일 생성부는 수신자의 ID를 암호화된 제1파일의 파일명 중 일부로 설정하고, 제1파일이 암호화되었음을 나타내는 암호화용 확장자를 제1파일의 확장자로 하여 암호화 파일을 생성한다.
Abstract:
PURPOSE: An ID based encoding and signature device and a method thereof are provided to use ID which is used for ID based encoding as a file name and to use a dedicated extension which shows the encoding or a signature, thereby enabling recognition for a file which security is applied. CONSTITUTION: When ID of a receiver who receives a first file is inputted, an encoding unit(152) encodes the first file by using the ID of the receiver as a public key. A file generation unit(153) sets the ID of the receiver as a part of a file name of the first file. The file generation unit generates an encoding file by using an encoding extension as an extension of the first file. The file generation unit sets an original file name, an original extension, and an identifier of the first file and the ID of the receiver as a file name of the encoding file. [Reference numerals] (150) First ID based processing module; (151) First screen generation unit; (152) First encoding unit; (153) First file generation unit; (154) First electronic signature unit; (155) First decoding unit; (156) First verification unit; (250) Second ID based processing module; (251) Second screen generation unit; (252) Second coding unit; (253) Second file generation unit; (254) Second electronic signature unit; (255) Second decoding unit; (256) Second verification unit
Abstract:
PURPOSE: A bead-based microchip with a temperature control function is provided to shorten chemical reaction time and to simplify test procedure. CONSTITUTION: A bead-based microchip with a temperature control function comprises: a microchip body(140) with a first reaction chamber(142) and second reaction chamber(144) which are connected through a fluid channel; a bead filled in the reaction chamber in which a ligand is fixed on the surface; a heater(150) which is attached on the lower side of the microchip body; and a cover(130) which is attached at the upper side of the microchip body and has a sample inlet and enzyme inlet.