Poster Print Size: This poster template is 50” high by 30” wide and is printed at 120% for a 60” high by 36” wide poster. It can be used to print any poster with a 5:3 aspect ratio. Placeholders: The various elements included in this poster are ones we often see in medical, research, and scientific posters. Feel free to edit, move, add, and delete items, or change the layout to suit your needs. Always check with your conference organizer for specific requirements. Image Quality: You can place digital photos or logo art in your poster file by selecting the Insert, Picture command, or by using standard copy & paste. For best results, all graphic elements should be at least pixels per inch in their final printed size. For instance, a 1600 x 1200 pixel photo will usually look fine up to 8“- 10” wide on your printed poster. To preview the print quality of images, select a magnification of 100% when previewing your poster. This will give you a good idea of what it will look like in print. If you are laying out a large poster and using half-scale dimensions, be sure to preview your graphics at 200% to see them at their final printed size. Please note that graphics from websites (such as the logo on your hospital's or university's home page) will only be 72dpi and not suitable for printing. [This sidebar area does not print.] Change Color Theme: This template is designed to use the built-in color themes in the newer versions of PowerPoint. To change the color theme, select the Design tab, then select the Colors drop-down list. The default color theme for this template is “Office”, so you can always return to that after trying some of the alternatives. Printing Your Poster: Once your poster file is ready, visit to order a high-quality, affordable poster print. Every order receives a free design review and we can deliver as fast as next business day within the US and Canada. Genigraphics® has been producing output from PowerPoint® longer than anyone in the industry; dating back to when we helped Microsoft® design the PowerPoint software. US and Canada: [This sidebar area does not print.] SafeChat Kadir Tufan- Burak Güzel,Aliye Yılmaz Fatih University, Department of Computer Engineering Burak Güzel Phone : Contact Abstract Safe Chat is a messaging application.The purpose of Safe Chat is to collect all type of mail and create group with your friends which are registered your mail account and to messaging each other. On the other hand Safe Chat is very safely application thanks to some technology. Safe Chat which provides secure messaging through the internet, making the runs on the android platform now working forward in time considered other mobile platforms is fast, secure application. Safe Chat is very helpful in order to use a mail more than one, also safely for them. Safe Chat is composed of two main parts. One of them is Client part. We used Android and SQLite at the client part. Other part is Web Service. We used Java and MySQL at the web service part. SSL SSL allows sensitive information such as credit card numbers, social security numbers, and login credentials to be transmitted securely. Normally, data sent between browsers and web servers is sent in plain text—leaving you vulnerable to eavesdropping. If an attacker is able to intercept all data being sent between a browser and a web server they can see and use that information. SSL is a security protocol. Protocols describe how algorithms should be used; in this case, the SSL protocol determines variables of the encryption for both the link and the data being transmitted. Security Protocols G-Mail Authentication Our applications follow a basic pattern when accessing a Google API using OAuth 2.0. At a high level, you follow four steps: 1.Obtain OAuth 2.0 credentials from the Google Developers Console. 2.Obtain an access token from the Google Authorization Server. 3.Send the access token to an API. 4.Refresh the access token, if necessary Figure 1.1:G-Mail Authentication Aliye Yılmaz Phone : Figure 1.2: AES Crypt AES AES Crypt is a file encryption software available on several operating systems that uses the industry standard Advanced Encryption Standard (AES) to easily and securely encrypt files. Using a powerful 256-bit encryption algorithm, AES Crypt can safely secure your most sensitive files. Once a file is encrypted, you do not have to worry about a person reading your sensitive information, as an encrypted file is completely useless without the password. It simply cannot be read. Google Cloud Messaging Google Cloud Messaging (GCM) is a service that enables developers to send data from servers to both Android applications or Chrome apps and extensions. The service provides a simple, lightweight mechanism that servers can use to tell mobile applications to contact the server directly, to fetch updated application or user data. The service handles all aspects of enqueuing of messages and delivery to the target application running on the target device. The free service has the ability to send a lightweight message informing the Android application of new data to be fetched from the server. Larger messages can be sent with up to 4 KB of pay load data. Each notification message size is limited to 1024 bytes, and Google limits the number of messages a sender sends in aggregate, and the number of messages a sender sends to a specific device. Figure 1.3:How to GCM Works Figure 1.3:How to SSL Works