Abstract. 1. Introduction Motivation

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1 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014), pp Abstract With the dramatic growth of the Android operating system, the demand of using Android as well as replacing personal computers for working and learning to Android has been increasing. One of the benefits of personal computers is offering excellent e-dictionary with quick lookups and updates. Now, with Android, the mobile phone will become a convenient pocket dictionary with more features than traditional dictionaries. In this paper we design and implement a dictionary application for Android. This application has special functions that legacy translation applications don t have and it is completely free to use, contains similar functions with paid applications, support popular application formats to take advantage of large free sources shared on the Internet, easy to use, and include pronunciation support. Keywords : Dictionary, Android App, Translation app 1. Introduction Motivation Android needs are increasing; plus the numbers of people using Android to replace personal computers in studying or working are growing. One of the benefits of personal computers is making it excellent with many advantages from the dictionary, quick lookup, updates the vocabulary easily. Now with Android, the phone will become extremely handy pocket dictionary with more features than a traditional dictionary[1,2] Therefore, we decided to build a dictionary application for Android with criteria as follows: Completely free to use. Provide functions that an application fee. Support popular dictionary formats to take advantage of the massive amount of free dictionaries to be shared on the Internet. Received(January 07, 2014), Review request(january 08, 2014), Review Result(1st: January 19, 2014, 2nd: February 01, 2014) Accepted(February 28, 2014) ISSN: JSE 101

2 A quick, easy to use. Support to pronounce. The dictionary application for Android, namely KRdic, has the following characteristics. Look up Users enter keywords need to investigation and KRdict will give the results is the definition or content tag that is defined by the dictionary that the user installed. Users can search on one or more dictionaries at the same time, depending on how much dictionary that the user installed. Dictionary is the format that the KRdict supports and places in the folder (the next version will support a variety of formats and allows the user to specify the folder containing the dictionary).dictionary content may be language dictionary, science dictionary, thesaurus, telephone systems, etc. Any database has activity by the method of keywords content. Camera dictionary KRdict take advantage of Camera dictionary function is installed on Android devices using to Conversion of Images text into characters. Leveraging the power of the smart phone, powerful speed of the Internet connection (which is essentially 3G) along with free services of Google Translate, KRdict allow expansion capabilities Camera dictionary with more languages than Android's image to text. The numbers of supported languages are more than 50 languages, including Vietnamese. Support a common document s format. One of the main criteria of KRdict is taking the advantage of free dictionaries available on the Internet, so to support common document s formats is essential[3,4] Nowadays, the format of the dictionary is various, but mostly free dictionary have formats as: DICT: this is the format that development by dict Development Group in order to create a kind of dictionary s format can pass the Webster protocols to access more dictionaries at the same time[5,6]. StarDict: The main format of the open source dictionary StarDict, that development from the Dict, but is designed to serve for some certain purposes. XDXF: using XML format to define keywords and content keywords. XDXF has built to include all different dictionary formats together. Because the time for this subject have limited, I decided to support DICT format first, which has a long lifetime and the total number of large dictionaries can be found Fast application execution The project team decided to performance is an important purpose which KRdict need to be achieved. By supporting search on a lot of dictionaries and many different dictionaries, KRdict need to ensure performance is as fast as possible. If a dictionary has slow performance, the user will not have any patience to use it. 102

3 Easy to use 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) KRdict is designed according to the criteria: just-looking-is-knowing-to-use, the user can look at is to understand the way to use. The main functions are shown in the main interface; so that users do not need to think as well as do not need to cumbersome. Interact with other applications in Android The scheme team wants KRdict become a runaway dictionary that can be called at any time, by any application on Android. This means that when users surf the web using one browser, seeing the documents in an application to view documents, or any application related to the text, when a word or problems that they need to look up, they can turn KRdict to lookup with keystrokes or method of user-defined[7,8]. 2. DICT Dictionary Format 2.1 DICT Protocol The main purpose of DICT is to create an online dictionary system via Internet, including a free shared database from anywhere. Figure 1 shows the structure of the dictionary protocol and the main purpose of this protocol is to find a new solution to replace Webster dictionary and enable users to access multiple dictionaries in one session. Dictionary server and client use port 2628 to communicate with each other. [Fig. 1] Structure of DICT Protocol So many Dict servers by many different languages such as: Dicttd: (A standard application server developed by DICT Development Group). GNU Dico: A server developed by GNU, Format Support another Dictionary between DICT formats. Each format is defined a loadable module and can be written in C, Python or Guile. JDicttd: Supports standard file formats and compression of DICT 103

4 DictD + +: A rookie server written in C++ (using STL, boost and a few others library), running on FreeBSD, Linux Mandrake, Windows 2K/XP Dictionary format of DICT Protocol The database of DICT Protocol is allocated separately. Each database consists of two plain text files: one is called flat text (*.Dict) and other is index file (*.index).two files are plain text and designed can be to read with any text editor [9,10,11]. Flat text (File Dictionary) This is a file Contains the main content dictionary definition of the word support. Content can be plain text or HTML tags. The Contents of a file created by DICT Development group within an available tool name dictfmt. The structure of flat file built the client can be random access to become reduce load file times and optimize file access performance multi-threaded server. Index File Index files are containing all the keywords file dictionary support. Dict Server will search keywords on the index file, if Have, content encoded in the index file and will be converted correct format and proceed to retrieve data from flat text[13]. An index file consists of lines; each line is a Definition of the Dictionary separated by TAB characters: Headword: keywords Offset: The starting position of the data in flat text. Length: length of data starting at offset. Ex: [Fig. 2] Content of record in index file The Content of offset and length is the number and encoded by BASE64 Encoding algorithm. Purpose to reduce the number of characters when use it in show number DICT protocol format 104

5 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) Base64 encoding Dict Protocol formatted Base64 encoding is an encoding format uses 64 ASCII characters to convert binary data (number of bytes, etc.) to a form can be represented on a text editor (using ASCII), Below is a table of ASCII characters used in Base64 encoding and its value compared with the binary data[1,3]. [Fig.3] the characters used in base 64 encoding In Dict Protocol, The offset and length values of the index record us encoded by Base64 in order to dace the numbers of characters use to show numbers. Be able to reverse encrypted data, and just made a similar algorithm covert from Base10 to Base2. Ex: If there is cord content Dictionary Iwcx Ex This means the content of the dictionary will start from position and the length (in bytes) Design of KRdict 105

3.1 Main functions of KRdict KRdict provides following functions: Look up Suggestions word Camera Dictionary History investigation Management Dictionary Add new Dictionary In the process encountered

6 3.1 Main functions of KRdict KRdict provides following functions: Look up Suggestions word Camera Dictionary History investigation Management Dictionary Add new Dictionary In the process encountered some difficulties, sometimes almost lost all hope. It is the process of running the emulator, because the configuration is not enough to response so I had to find ways to adjust quickly, but the results were not as expected, the emulator always crashes when active[8,9]. Another difficulty is programmed for the dictionary model, both original members of the group have to find and try every way to make the search faster, but the result is KRdict still very slow search. After this, to catch up, the work was divided into two parts for two members: Android research and dictionary model development. Specifically, we have completed the desired part. This is Diagram of general KRdict. Each of part function has a relationship 106 [Fig. 4] Diagram of general KRdict

보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) 3.

We will try to do for this setup is similar to installing on a device.

Open the command line: cd to directory KRdict.apk, type adb install KRdict.

After this step, the application has been completed on the emulator. Checks the screen have KRdict yet. Application KRdict with icon B.

7 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) 3.2 Install the application dictionary[12,13] Do not have a device to install, we will show how to install the emulator. We will try to do for this setup is similar to installing on a device. How to install and using KRdict also the video tutorials are included in the CD accompanying the report. Open the command line: cd to directory KRdict.apk, type adb install KRdict.apk, and this statement corresponds to the double click on KRdict.apk on device to install. After this step, the application has been completed on the emulator. Checks the screen have KRdict yet. Application KRdict with icon B Add new Dictionary At the time, KRdict provides the following functions: Scan dictionaries on SD card, search, Cam dictionar y.. [Fig. 5] Main Application [Fig. 6] Update new dictionary KRdict provides button and menu; users can have access to different sections by click button on screen or press Menu button on device. You select Manage, a black screen will appear, this is the Dictionary window management will be use. Press Menu on device, on screen will be appearing below screen, select Scan to update and find dictionary. Update new dictionary successful the message will show on main screen Successful update new dictionary. Please close application the open. Thanks you!! 107

3.2.2 Turn off Exit Dictionary and open up to display results [Fig. 7] Turn off dictionary 3.2.3 Look up and results Type a word to search, press enter or click.

8 3.2.2 Turn off Exit Dictionary and open up to display results [Fig. 7] Turn off dictionary Look up and results Type a word to search, press enter or click. Wait a little, the result will appear. On Emulator result will be appear slow may be 4~5 second. If used on a device, the results will appear immediately [Fig. 8] Look up dictionary 108

보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) 3.2.4 Using Cam Dictionary Besides the ordinary functionalities, we intend to integrate camera-real-time-translating function into my dictionary.

9 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) Using Cam Dictionary Besides the ordinary functionalities, we intend to integrate camera-real-time-translating function into my dictionary. In Figure 9, we will use dictionary Korea-Vietnam. If user wants to use Cam dict for conversion of images of text into characters click button image camera for using it. [Fig. 9] Using Cam Dict Save picture and choose a word When using function take picture by camera using on device. Click button save and waiting for results. After take world and save to SD card. Result will be show on the figure. See world list and click the word user want to translate. 109

10 [Fig. 10] Result 3.3 Comparision between current Dictionary and Krdict [Table 1] Compare Functions of the Dictionary The dictionary support all features better than another Commercial dictionary which do not support many functions 110

11 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) Besides my dictionary also support more features such as: Add new Dictionary such as: France, Italy, Japan. Camera Dictionary Update new Dictionary Dict Protocol It is an open standard; which people can edit on my previous project and in own new application It supports formats popular dictionary, Have many free Dictionary on the Internet. Its databases are not encrypted so users can insert their own words It has friendly interface and easy to use. Oder to develop their This application can be used on all mobile devices using the android operating system over version 2.2. Overall, the dictionary I m developing can replace another commercial dictionary used on mobile devices running on android application. 4. Conclusion and Future works After finalizing the research, with this research I m proud to achieve the prior objectives such as Word look-up, word suggestion, cross-dictionary, search history and Cam dictionary, in order to enhance a special dictionary for Android users. The researchers also expect that whenever users want to use dictionary, Being developed in an environment that lacks of mobile devices has motivated is to find out innovative me to find out innovative solutions in data processing, that is better than the original method of using PC-based available source, and ensure rapid speed plus resource-wasting avoidance. Furthermore, new databases along with various data-searching alternatives acquired from the project execution are valuable knowledge for the future. The advantages of KRdick are followes KRdict is an open source application; people can contribute to building and development Speedy process of KRdict Quickly, abreast with speed of the commercial dictionary Friendly interface, easy to use It can be used on all mobile devices using the android operating system over version 2.2. If the time is given more, I am surely believed that there will have more formats dictionary support for 111

12 KRdict which will provide more useful function for users. The purpose of further development is to create separate format dictionary on KRdict, provide open source tools for other people, who are interesting in building their own dictionary. As a developer of this project I m always want KRdict will become an indispensable application for Android device user and other mobile platform. 112

13 보안공학연구논문지 Journal of Security Engineering Vol.11, No.1 (2014) Reference [1] Joshua Bloch. Editor, Effective Java 2nd Edition, Prentice Hall PTR, (2011) [2] Fab 21 (2011) [3] Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides, Design Patterns: Elements of Reusable Object-Oriented, Addison-Wesley, (2010) [4] Eric Freeman, Elisabeth Robson, Bert Bates, Kathy Sierra, Head First Design Pattern, O Relly Media, (2011) [5] Robert C.Martin, Editor, Clean Code A Handbook of Agile Software Craftmanship, Pearson Education. March 11(2011). [6] Fab 21 (2011). [7] (2010) [8] January 12(2011) [9] -platform, January 31(2011) [10] March 23(2011). [11] March 23(2011). [12] March 23(2011). [13] February 2(2011). 113

Testing Tool, V&V Tech. Jihyun Lee 1993: B.S. in Information and Communication Engineering, Jeonbuk National University 2000: M.S. in Education in Computer Science, Jeonbuk National University 2005: Ph.

14 Authors Sun Myung Hwang 1982: B.S. in Computer Engineerig, Chung Ang University 1984: M.S. in Computer Engineerig, Chung Ang University 1987: Ph.D. in Computer Engineerig, Chung Ang University 1988: Post Doctor in Bonn University 1989년 present: Professor, Daejeon University Reserch Interests: SW Quality Assurance, Process Assessment, Testing Tool, V&V Tech. Jihyun Lee 1993: B.S. in Information and Communication Engineering, Jeonbuk National University 2000: M.S. in Education in Computer Science, Jeonbuk National University 2005: Ph.D. in Computer Science, Jeonbuk National University 2011: Research Professor in KAIST 2012 present: Associate Professor, Daejeon University Research Interests: Software Product Line, Software Testing, Software Architecture Evaluation 114

Abstract. 1. Introduction

Abstract. 1. Introduction 보안공학연구논문지 제 권제 호 년 월 Abstract In these days, many organizations try to manage their information system in safe way(i.e., Evaluation, Assurance and Certification of Information Security) due to more rapidly