steghide: steganography don ɓoye rubutu a cikin hotuna

steghide Kayan aiki ne wanda za'a iya girka shi a cikin rarrabawar mu na GNU / Linux kuma za'a iya amfani dashi don aiwatar da steganography. Kuma menene wancan? Da kyau, ga waɗanda basu sani ba, steganography fasaha ce ta ɓoye bayanai a cikin matani, hotuna da sauran nau'ikan takaddun dijital (hotuna, bidiyo, sauti, ...). Tun zamanin da ana amfani dashi don aika saƙonni na sirri da ɓoye kowane irin bayani, kuma a yau gwamnatoci suna ci gaba da amfani da shi sau da yawa sosai.

En steganography akwai mai ɗauka, wanda a wannan yanayin zai zama hoton jpg, da ɓoyayyun bayanan da za ayi amfani da su jigilar kaya azaman matsakaicin matsakaici. Abin da ake nufi shi ne cewa mai aikawa zai iya isar da wannan bayanin ga mai karɓa ba tare da wasu kamfanoni sun sami damar isa gare shi a sauƙaƙe ba, ma'ana, yana da irin wannan manufar ta ɓoye.

Don yin wannan, abu na farko shine girka akan tsarin mu na steghide (Akwai nau'ikan kayan aiki da yawa na wannan nau'in, wani zaɓi shine python-stepic) wanda zai bamu damar saka bayanan ɓoye a cikin hoton. Don yin wannan, rubuta:

sudo aptitude install steghide

Yanzu tunda kun girka shi, kawai kuna buƙatar ɗaukar hoto wanda kuke da shi a hannu cikin tsarin jpg, misali, da takaddar rubutu bayyananne (.txt) tare da saƙon da kuke son ɓoyewa. Ka yi tunanin cewa hoton ana kiran sa foto01.jpg kuma ka adana saƙon a cikin fayil ɗin message.txt. Da zarar kuna da waɗannan sinadaran, zaka iya samarda hoto tare da buyayyar rubutu buga a cikin m:

steghide embed -cf foto01.jpg -ef mensaje.txt

Zai nemi kalmar sirri don kare shi. Mai karɓar hoton yana iya dawo da sakon da aka boye tare da kalmar wucewa idan kun rubuta:

steghide -extract -sf foto01.jpg

Idan da wani dalili ne ya sanya hoton ya shiga ta wani bangare, ba za su iya ganin sakon da aka boye ba sai dai idan sun san cewa an saka shi kuma za su iya gano kalmar sirri, tunda da farko kallonsu ba shi yiwuwa su lura da bambanci. Wata hanyar wucewa ta sakonni "masu zaman kansu" ta amfani da madadin cryptography...