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1 19 Development of moving image delivery system for elementary school

2 Web Basic Web SAS-2 Web SAS-2 i

3 Abstract Development of moving image delivery system for elementary school Ayuko INOUE Protectors can not know casual class condition in classroom visitations and an athletic meet, and there is the problem that protectors can not take enough communications mundanely with their children. Protectors want the school to disclose information using the Internet so that protectors know casual class condition. There are many demands of moving image delivery in particular in that. In the field of education, a moving image delivery system for the kindergarten is suggested. This system delivers moving images of children to their protectors. However, there is a problem in safety because it uses Basic authentication. In addition, the burden of the teacher managing this system becomes considerable big to use this system in the elementary school. Because the change of the camera according to a complicated class schedule is necessary. This paper proposes moving image delivery system for the elementary school. The proposal system improves safety by using one-time password authentication protocol SAS-2, and reduces the load of the switch of the camera. The proposal system is evaluated by safety and convenience and compared with existing methods. key words elementary school, moving image delivery, one-time password, SAS-2 ii

4 SAS iii

5 21 22 iv

6 SAS SAS v

7 vi

8 1 [1] [2] [3] [4] Web Basic Web 1

9 SAS-2 3 Web

10 2 2.1 [5] Web [6] 3 Basic 2.1 3

11 Basic Basic Web Web Web 4

12 Basic 3 3 [7] 5

13 Web Web Web 6

14 Web Web Web 3 SAS-2 [8] Web Web ID Web 7

15 SAS-2 Basic 3 SAS-2 3 SAS-2 SAS-2 User 8

16 3.1 Server User ID S X F H, H(x) x i N i i + SAS SAS-2 1. ID S N 1 ID S N 1 A = X(ID, S N 1 ) 2. ID, A 3. ID A 3.3 i SAS-2 9

17 SAS-2 1. ID S N i A = X(ID, S N i ) N ( i + 1) C = X(ID, S N ( i + 1)) F (C) = F (ID, C) C F (C) A α = C (F (C) + A) β = F (C) A 2. ID α β 3. β A F (C) = β A F (C) F (ID, C) 4. A C γ = H(ID, F (C)) 5. γ 6. H(ID, F (C)) γ 10

18 SAS-2 11

19 3.1 3 SAS-2 SAS-2 SAS-2 (i + 1) α E (F (E) + C) β F (E) C ID 3 α x (F (x) + C) β F (x) C ID 3 i SAS Web Web 12

20 Web Web 3.4 DB Web ID Web 3.6 A A A B 13

21 3.2 B OS WindowsXP Web Apache2 PHP Java DB MySQL 3.1 OS Web DB WindowsXP Apache2 PHP Java MySQL 14

22 i i Web Web 15

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24 Basic SAS Web Web Web 17

25 4.2 ID Web Web Web Web Web

26 4.3 19

27 5 Web SAS-2 Web 20

28 21

29 [1] 2002 [2] [3] japan.internet.com, 77, 2007/5/21. [4], march, 2008/1/17. [5] Vol.29 No.Suppl pp [6] -Darwin Streaming Server - 12 pp [7] CBT Computer Based Testing WWW Vol. 7 No [8] T.Tsuji and A.Shimizu, A one-time password authentication method for low spec machines and on internet protocols, IEICE Trans.Commun., vol.e87-b, no.6, pp , June

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