Tìm hiểu và phát triển kỹ thuật ẩn thông tin trong dữ liệu âm thanh

BO GIAO DUC vA DAo TAO TRUONG DHDL NGOAI NGU - TIN HOC TP.HCM KHOA CONG NGH:E:THONG TIN KHOA LuAN TOT NGHIEP • • TiM HIEU vA PHAT TRIEN KY THUAT " -;: AN THONG TIN • TRONG DU LIEU • AM THANH GIANG VlEN HUONG DAN :DUONG MINH DUC - SINH VIEN THlfC HI:E:N :PHAN TRUNG HIEU / - ' 'IV '1 ) "'-"" • ~ ' •.•• ~ , ""-::a I ~.: ~} / I"'" :' ,./ - '\ '1 ••• , \ ••••.•• " \"~- TP HO CHI MINH - 2008 An Thong Tin Trang Du Li~u Am Thanh LOICAM'ON Em xin chan dim on khoa Cong Ngh~ Thong Tin da t~o mQi diSu ki~n giup em hoan d6 an cua minh Em cling xin chan cam on thc1yDUONG MINH DUC da nhi~t tinh huang dful em th\fc hi~n lu?n van Trang su6t thai gian viTa qua thc1y da truySn d~t nhung kiSn thuc chuyen mon cc1nthiSt cho em, em dugc r€m luy~n m(>t phuong phap hQc t?P va lam vi~c d(>c l?p Day la diSu cc1nthiSt dS co thS cong b~t tay vao nghS nghi~p trang tuong lai Ben c~nh nhung kSt qua rna em d~t dugc, ch~c ch~n khong tranh kh6i nhfrng sai lc1m,thiSu sot th\fc hi~n d6 an, kinh mong thc1y co thong cam S\f phe binh cua thc1yco se la nhfrng bai hQc kinh nghi~m rfit quy bau cho cong vi~c thvc tS cua em sau M(>t lcln nua, em xin chan cam on"cong lao d~y de; cua quy thc1yco Kinh chuc quy thc1yco m~nh kh6e, tiSp 1\lc d~t dugc nhiSu th~ng 19i nghien CUukhoa hQc va S\f nghi~p tr6ng nguai TP.H6 Chi Minh, 29, thang 7, nam 2008 Sinh vien thvc hi~n : Phan Trung HiSu An Thong Tin Trang Dfr Li~u Am Thanh NHAN XET eVA GIAo VlEN HUaNG nAN • .• • ••• • • •.• •• •• • •• ••• .• • • •.• • • • •••.••• • •.•• • • • •• ••• •.•.• •• .• .•• • .•••••••• ••.•••• • • ••••••••••••••••••••••.••••••••• ••••.•.• ••••••••• .•.•• .• •.•• •••••• ••• .•• • • An Thong Tin Trang Dfr Li~u Am Thanh NHAN XET eVA GIAo VIEN pHAN BIEN ••.•• ••••• ••••• ••• • • • • .• ••• .•.•.• • • •• .• .•• • •• ••••••••• .• • ••• ••••.•• •••• •.• •••.• .••••••••• ••••• ••••• .••••••••• •.•••••• ••••• •••• •••••••••• • •• •••• •.•••••••••••• • ••••••• •••• • • • An Thong Tin Trong Dfr Li~u Am Thanh MOTS6THUATNGrrCHUyiNNGANH Datahiding: la thu~t ngfr chi ky thu~t gifiu tin noi chung bao g6m ca gifiu tin m~t va thuy van s6 Steganography: chi ky thu~t gifiu tin m~t m t: H :> ) (J) Hinh 18: C~u truc file wave A.2.I KhBi rno ta d~ng RIFF: Kh6i xac dinh dt kh6i dfr li~u byte nhu la m(>t header: Layer Field khong thS la 00 Bit-Rate Field khong thS la 0000 hay 1111 Frequency Field khong thS la 11 M(>t kh6i byte rna b~t dau vai Sync va khong vi ph?m nhfrng di~u da duqc li~t ke ben tren thi th?t SlJ la m(>tHeader • • 77 Ph\JI\Jc B: cfiu Truc File Mp3 • Hinh ben du6i se gi6i thi~u mcua ty l~ bit (bit-rate) va d.n sf>mfru (sampling frequency) Kich thuac cua frame duqc tinh b~ng byte va co th~ tinh duqc d\Ia vao cong thuc: , -I I I I : I I I FrarneSize = 144 * BitRate / (SarnpleRate + Padding) ~ -~ , H~u h~t nhung field rna khong co dinh liu tai S\I tinh toan kich thuac cua frame la khong c~n thi~t Trang th\Ic t~ m9t sf>chung la rfit hi~m duqc Slr d\lng • Tuy nhien, filed G ho~c Padding Bit la r&.tquan tr9ng Thinh thming nhung frame c~n phai duqc d9n (padded) them nhung byte r6ng to can b~ng vai tY l~ frame Co nghla la m9t sf>frame bao g6m m9t byte du li~u khong Slr d\lng Thong tin co th~ dS dang duqc khai thac boi steganographer • , I : I I I I 79 An thong tin dfr li~u am TAl LI~U THAM KHAo [1] Christian Neubauer Fraunhofer Institute for Integrated Circuits, Audio Watermarking of MPEG-2 AAC Bitstreams, Watermarking workshop, Erlangen, October ,5th 1999 [2] Frank Siebenhaar- Christian Neubauer and Jurgen Herre Fraunhofer Institute for Integrated Circuits, Combined Compression/Watermarking for Audio Signals, 91058 Erlangen, Germany [3] Michael Arnold-Martin Schmucker-Stephen D.Wolthusen, Techniques and Application of Digital Watermarking and Content Protection, Artech House Computer Security Series • [4] Nedeljko Cvejic, Tapio SeppAanen, Increasing Robustness of LSB Audio Steganography by Reduced Distortion LSB Coding, MediaTeam, Information Processing Laboratory, University of Oulu, Finland [5] Stefan Katzenbeisser, Fabien A P Petitcolas, Information Hiding Techniques for Steganography and Digital Watermarking, Artech House [6] W Bender - D Gruhl - N Morimoto - A Lu, Techniques for data hidding, IBM Systems Journal-vol 35-nos 3&4, February 29, 1996 [7] Dinh d:;mgfile WAVE http://www.borg.coml~jglatt/tech/wave.htm [8] WAVE PCM sound file format http:// ccrma stanford.edu/CCRMA/Courses/422/proj ects/W aveFormat/ [9] Tham khao code http://www.codeproject.com/KB/recipes/rc4csharp.aspx [10] Steganography and Digital Watermarking • ,', http://www.cs.bham.ac uk/~mdr/teaching/modules/security /lectures/Steganograp hy.htm 80 An thong tin dfr li~u am [11] Digital Watermarking Alliance http://www digitalwatermarkingalliance.org/membership.asp#verimatrix [12]Audio Box http://www.ece.uvic.ca/%7Eaupward/w/watermarking.htm [13] T6 chuc MSI http://www.msicopycontrol.com/ • [14] Steganography http://www.namdinhonline.net/forum/showthread php?t=6060&goto=nextoldest [15] Network information security vietnam http://www.nis.com.vn [16] Ca chS quan ly bao m?t AACS http://www.pcworld.com.vn/pcworld/magazine a.asp?t=mzdetail&atcl d5e595f56 [17] / Encryption/Decyprtion using RC4 (slide) Vivek Ramachandran http://www.security-freak.net/encryptionlEncryption ppt [18] Methods of Audio Steganography http://www.snotmonkey.com/work/school/405/methods.html#eval [19] Tri tu~ Vi~t Nam http://www.ttvn.com.vn/viVN/tintuc/gioithieusp/2005/l1/381.ttvn [20] T6 chuc Verance http://www.verance.com/vcms/lic pro.html [21] RC4 Encryption Algorithm http://www.vocal.com/RC4.html [22] An thong tin file Mp3: www.terminally-incoherent.com/stuff/proj ects/mp3 stego/paper doc id=5f5e5