八、試述如何防患電腦中毒。（20 分）

四、試述電子商務中，何種服務機制可用以確認訊息來源？該機制的功能與特性為何？ （10 分）

五、試述五種內部排序的方法。（10 分）

六、試述五種資料解密的方法。（10 分）

七、試述四種資料庫模式，並論述其優缺點。（20 分）

一、請將下列英文譯為中文：（20 分）  After the ship characteristics have been determined during the preliminary design phase, the next task is to write a specification describing the design and minimum requirements such that it is definitive and yet does not impose undue constraints on the development of design details. For merchant ships, the invoked requirements of the classification societies such as the American Bureau of Shipping or Lloyd’s Register of Shipping play an important role. These requirements and others such as those of the United States Coast Guard and the Public Health Service establish base minimum requirements for a ship. Building form these minimum requirements, detailed specifications are prepared which describe the characteristics of the particular ship desired.

⑴搭載乘客之小船，不得兼載爆炸性、易燃性、有毒性、傳染性、放射性、壓縮性 或有腐蝕性之危險物品。

⑵載客小船應具有足夠之穩度，並以全船載客集中於小船之一舷，而甲板線不致沒 入水中為原則。

⑴ Continuous Service Rating（CSR）

⑵ Deadweight

⑶ Transom stern