The Development Application by Steganography in Image via Multimedia Messaging Service
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1 ก ก ก The Development Application by Steganography in Image via Multimedia Messaging Service (Pattarapong Reabroicharoen) 1 กก (Kiattisak Yochanang) 2 1,2 ก fotofuns_kiss@hotmail.com, umph2002tct@hotmail.com ก ก ก ก ก ก ก ก ก (Blowfish Encryption) ก (Least Significant Bit) ก ก ก ก ก ก ก ก ก ก ก 5 ก ก 4.46 ก ก 30 ก ก 4.41 : ก ก ก Abstract This Research a purpose was to developing an application program for steganography in image via multimedia messaging service, The main purposive of disclosure make people know that the secret is hidden information, there for this research presents steganography in image by using cryptography with Blowfish encryption before then method for hiding in image at least significant bit of image (LSB), A popular algorithms for hidden information, these methods is simple and sufficient in hidden information and this method will increase information security, The result shows that after experimental research, it is more effective in using these methods, In the quality evaluation result from 5 experts the average is 4.46 show that result of the program has a good quality level and In the quality evaluation result from 5 end user the average is 4.41 show that result of the program has a good quality level Keyword: Steganography, Cryptography, Blowfish Encryption, Least Significant Bit 1. ก ก ก ก ก ก ก ก ก ก กก ก กกก ก (Steganography) ก ก ก ก ก ก ก ก -619-
2 ก ก ก ก ก ก ก (Least Significant Bit) ก (Message) ก ก (Encryption) ก (Decryption) (Blowfish) กก ก ก ก กก ก ก ก ก ก ก 448 ก ก ก ก Blowfish ก ก ก ก secure shell (SSH) 2. ก 2.1 ก (Steganography Theory) ก ก ก ก ก ก ก ก ก กก ก ก ก ก ก ก ก 2.2 ก (Blowfish Encryption) Blowfish [1] ก 64 Bit Block Cipher กก ก ก ก 64 Variable-Length Key ก ก 16 กก Feistel Network ก ก S-boxes ก ก กก CAST-128 Fixed S-boxes 1:* ก (Diagram of Blowfish) ก 1 Diagram ก ก ก F (F-function) กก F Input ก 4 S-boxes ก F ก S-box Output ก 32 ก S-box ก ก 2 32 ก XOR ก Shirali-Shahreza [2] ก ก Steganography in MMS (2007) ก ก ก MMS (Multimedia Messaging Service) Message ก ก ก 2 ก (Image) ก ก (Text) ก ก ก (Image) (Text) (Text) (Image) PNG (Portable Network Graphics) J2ME (JAVA 2 Micro Edition) Gutub, Al-Qahtani, Tabakh [3] ก ก Triple-A: Secure RGB Image Steganography Based on Randomization (2009) ก ก ก ก triple-a algorithm ก -620-
3 (Least Significant Bit (LSB) ก ก ก ก 1 ก ก ก Samaratunge, S.G.K [4] ก ก New steganography technique for palette based images (2007) ก Stretching Palette ก กก public key ก Stretching Palette indexed image (8 ก ) GIF, BMP and PNG-8 3. ก ก 3.1 ก ก 2:* ก 2 ก ก Blowfish (Cipher) ก Cipher (Encode) ก (Decode) Cipher Cipher Blowfish ก ก ก ก ก Flow ก ก ก (ก) ( ) 3:*ก (ก) ( ) ก 3 (ก) ก ก ก (Plaintext) Secret key ก ก Blowfish (Ciphertext) ก Encode (Stego files) ก MMS (Send MMS) ก ( ) ก (Stego files) ก ก Decode ก ก (Ciphertext) ก ก secret key key ก ก ก ก Blowfish (Plaintext) ก ก MMS ก ก (Data Flow Diagram : DFD) ก ก ก ก ก กก ก
4 (ก) ( ) 4:* ก 1 (Data Flow Diagram Level 1) ก ก ก 4*Data Flow Diagram Level 1 ก ก 3 ก ก ก ก 1.0 Encryption and Decryption ก กก ก กก Blowfish ก ก กก ก ก 2.0 Hidden in Image ก กก ก ก ก ก ก ก 3.0 Connect system ก ก ก ก ก Windows Mobile ก ก ก ก 3.2 ก ก ก ก 5:*ก ก ก (ก) ( ) ก 5 กก ก 5 (ก) ก ก ก ก ก ก ก ก Cipher Text 5 ( ) ก ก ก ก ก ก ก ก (Plaintext) ก ก ก ก 4. ก 4.1 ก ก ก ก ก ก 2 ก Encode ก Blowfish ก Decode ก ก ก ก ก ก Blowfish (Plaintext) -622-
5 ก กก ก 1 ก 2 1:* ก ก (ก) ( ) 6:* ก ก (ก) ( ) ก 6 (ก) ก ก ก Filename ก, Save To ก ก main Memory Storage card, Message Key ก ก Encode ก กก ก ก 6 ( ) ก ก Filename ก ก, Key ก, Message (Plaintext), ก Decode ก ก (Plaintext) กก ก ก ก ก ก ก ก กก ก ก ก กก ก กก กก ก ก 2:* ก 4.2 ก ก ก ก ก ก 2 ก ก ก ก ก กก ก 4.46 ( ก 0.50) กก ก 4.41 ( ก 0.60) ก ก ก -623-
6 ก technique for palette based images. Second International Conference on Industrial and Information Systems, ก ก ก ก กก Steganography Cryptography ก ก ก กก Cryptography ก Blowfish Algorithm ก กก Steganography ก กก ก Blowfish ก ก ก (Least Significant Bit) ก ก กก ก ก ก ก ก ก ก ก ก ก 4.46 ( ก 0.50) ก ก ก ก ก [1] Blowfish. [online]. [cited 2008 September 10] Available from : URL : [2] Mohammad Shirali-Shahreza. Steganography in MMS. The 11th IEEE International Multitopic Conference, [3] Adnan Gutub, Ayed Al-Qahtani, and Abdulaziz Tabakh. Triple-A: Secure RGB Image Steganography Based on Randomization. The 7th ACS/IEEE International Conference on Computer Systems and Applications, [4] S.G.K.D.N Samaratunge. New steganography -624-
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