steghide: i-steganography yokufihla isicatshulwa kwimifanekiso

steghide Isixhobo esinokufakwa kulwabiwo lwethu lwe-GNU / Linux kwaye sinokusetyenziselwa ukuziqhelanisa ne-steganography. Yintoni leyo? Ewe, kwabo bangaziyo, i-steganography bubugcisa bokufihla ulwazi kwizicatshulwa, kwimifanekiso nakwezinye iintlobo zamaxwebhu edigital (imifanekiso, iividiyo, isandi, ...). Ukusukela kumaxesha amandulo yayisetyenziselwa ukuthumela imiyalezo eyimfihlo kunye nokufihla zonke iintlobo zolwazi, kwaye namhlanje oorhulumente bayaqhubeka nokuyisebenzisa rhoqo.

En steganografi kukho ophetheyo, oya kuthi kule meko abe ngumfanekiso we-jpg, kunye nolwazi olufihlakeleyo oluya kusetyenziswa ngu njengomthuthi njengesixhobo sokuhambisa. Yintoni eyenziweyo kukuba umthumeli angalunikezela olu lwazi kumamkeli ngaphandle kokuba umntu wesithathu akwazi ukufikelela ngokulula, oko kukuthi, unenjongo efanayo nokubhala ngokufihlakeleyo.

Ukwenza oku, into yokuqala yile fakela kwinkqubo yethu ye-steghide (Zininzi izixhobo zolu hlobo, enye inketho yi-python-stepic) eya kusivumela ukuba sishumeke ulwazi olufihliweyo emfanekisweni. Ukwenza oku, chwetheza:

sudo aptitude install steghide

Ngoku ukuba uyifakile, kufuneka uthathe ifoto onayo kwifomathi ye-jpg, umzekelo, kunye noxwebhu olucacileyo (.txt) ngomyalezo ofuna ukuwufihla. Khawufane ucinge ukuba ifoto ibizwa ngokuba yi-foto01.jpg kwaye ugcine umyalezo kwifayile message.txt. Nje ukuba unezo zithako, unokwenza umfanekiso ngombhalo ofihliweyo Ukuchwetheza kwisiphelo sendlela:

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

Iya kukucela iphasiwedi ukuyikhusela. Ummkeli womfanekiso unakho fumana umyalezo ofihliweyo ngegama eligqithisiweyo ukuba uchwetheza:

steghide -extract -sf foto01.jpg

Ukuba ngesizathu esithile ifoto ibanjiwe ngumntu wesithathu, abayi kuba nakho ukubona umyalezo ofihliweyo ngaphandle kokuba bayazi ukuba ungenisiwe kwaye banokufumana igama eligqithisiweyo, kuba ekuboneni kokuqala akunakwenzeka ukuba baqaphele Umahluko. Enye indlela yokudlulisa imiyalezo "yabucala" usebenzisa enye indlela yokubhala ngokufihlakeleyo...