Ubuqiniso be-PDF
Ilebula efihliwe nge-steganography ihlonza uphawu noma umamukeli wefayela ngalinye. Ingakhishwa kuphela nge-Qinisekisa.
Sayina ama-PDF nge-steganography futhi uqinisekise ubuqiniso bawo
Fihla ilebula yakho ngaphakathi efayeleni, susa i-metadata yalo futhi ulivikele ezinguqukweni. Konke kwenzeka kusiphequluli sakho, mahhala futhi ngaphandle kokubhalisa.
Vala isivimbi sakho sezikhangiso
Sithole isivimbi sezikhangiso kusiphequluli sakho. Ukuze usebenzise ithuluzi, sivale kule sayithi ngesikhathi usayina noma uqinisekisa ama-PDF akho. Ifayela lakho lisacutshungulwa kuphela kudivayisi yakho.
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Izikhangiso zigcina leli thuluzi limahhala.
Kuhlolwa ukuthi izikhangiso ziyalayisha…
Layisha i-PDF yakho
Hudula ifayela lakho lapha noma uchofoze ukuze ulikhethe.
Hudula lapha i-PDF ofuna ukuyisayina
Noma uchofoze ukuze uyilayishe kudivayisi yakho
Ifomethi esekelwayo: PDF · Kufika ku-80 MB
Noma uchofoze ukuze uyilayishe kudivayisi yakho
Ifomethi esekelwayo: PDF · Kufika ku-80 MB
Mahhala futhi ngaphandle kokubhalisa
Ifunda i-PDF yakho…
Umzuzwana, sihlola ifayela kudivayisi yakho.
Buyekeza ifayela lakho
Ulwazi olusele olutholakele
Lonke lolu lwazi olusele luzosuswa efayeleni. Umbhalo, izithombe nokubukeka kwedokhumenti akushintshi.
Icubungula i-PDF yakho
Gcina le thebhu ivuliwe kuze kuqedwe.
I-PDF yakho isayiniwe futhi ivikelekile
LandaUkhiye wokuvikela ongahleliwe ulahliwe ekugcineni futhi awugcinwanga ndawo.
Isiginesha efihliwe
Izigxivizo zefayela lokugcina
Gcina lezi zigxivizo: uma ngisho ibhayithi elilodwa lefayela lishintsha, zishintsha ngokuphelele.
Umphumela wokuqinisekisa
Izigxivizo zefayela
Ukuvikela kwamanje
Asikwazanga ukucubungula ifayela
Kuyimfihlo ngo-100%: i-PDF yakho icutshungulwa kudivayisi yakho futhi ayilayishwa kunoma iyiphi iseva.
Iziqinisekiso ezine zayo yonke i-PDF
Isiginesha efihliwe, isigxivizo nokubethela kusebenza ndawonye: kuhlonza ifayela, kuveza izinguquko futhi kunciphisa ukuhlela.
Ubuqotho ngezigxivizo ze-hash
Kubalwa izigxivizo ze-SHA-1, SHA-256 ne-SHA-512, futhi isiginesha igcina isigxivizo sokuqukethwe ukuze kutholwe ukuguqulwa kwe-PDF.
Imfihlo
Ukususa i-metadata kucisha umbhali, isofthiwe, izinsuku, idatha yezinhlelo nezinguqulo ezindala ifayela elizithwalayo ungazi.
Ukuvikela i-PDF
Ukubethela nge-AES-256 ngokhiye ongahleliwe ongagcinwa neze: isifundi sivimba ukuhlela nokukhipha okuqukethwe.
Indlela esebenza ngayo ngezinyathelo ezi-3
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Layisha i-PDF yakho
Khetha Sayina i-PDF, khetha ifayela futhi ubuyekeze isifinyezo solwazi olusele oluzosuswa. Bese ubhala umbhalo omfushane ozoba isiginesha yakho efihliwe.
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Isiphequluli sakho senza umsebenzi
Sihlanza i-metadata, sifihle isiginesha nge-steganography, sivikele ifayela ngokhiye ongahleliwe futhi sibale izigxivizo ze-SHA-1, SHA-256 ne-SHA-512. Akukho okulayishwa ku-inthanethi.
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Landa futhi uqinisekise
Uthola i-PDF enegama elifanayo kanye nosuku lwanamuhla. Noma nini lapho ufuna ukuyihlola, yilayishe ku-Qinisekisa i-PDF: isiginesha iyakhishwa futhi ithuluzi liqinisekisa ukuthi okuqukethwe akushintshile.
Izibonelo zokusetshenziswa
Kunoma ubani oletha amadokhumenti futhi okungenzeka adinge ukufakazela imvelaphi yawo kamuva.
Imibiko nokulethwa kumakhasimende
Maka konke ukulethwa ngegama lekhasimende nelephrojekthi. Uma umbiko usakazeka ngaphandle kwemvume, uzokwazi ukuthi uvelaphi.
Amadokhumenti ayimfihlo
Sebenzisa isiginesha ehlukile kumamukeli ngamunye. Uma ifayela liputshuka, isiginesha ekhishiwe ikhombisa ukuthi bekuyiyiphi ikhophi.
Izinkontileka neziphakamiso
Hlola ukuthi i-PDF ebuyela kuwe iyafana naleyo oyithumele, ngaphandle kwezinguquko emigomeni, emananini noma ezinsukwini.
Imibiko yochwepheshe, ama-thesis nemisebenzi yezemfundo
Letha imibiko namaphepha nesigxivizo sawo se-hash kanye nesiginesha efihliwe efakazela inguqulo yokuqala.
Ama-invoyisi nezilinganiso zentengo
Thola izinguquko emananini noma ezintweni ngemva kokuthumela, ngaphandle kokuthembela ekutheni ikhasimende ligcine eyakho yokuqala.
Amaphothifoliyo, ama-CV namakhathalogi
Susa i-metadata yombhali neyesofthiwe ngaphambi kokushicilela, futhi ushiye uphawu lwakho olufakazela imvelaphi yefayela.
Imibuzo evame ukubuzwa
Iyini i-steganography ku-PDF?
Kuyindlela yokufihla ulwazi ngaphakathi efayeleni ngaphandle kokuthi kuqashelwe (i-steganography ye-PDF). I-FirmaDigitalPDF igcina isiginesha yakho ezikhaleni zangaphakathi zokuqukethwe kwekhasi: idokhumenti ibukeka futhi iphrinteka ngendlela efanayo, futhi isiginesha ingakhishwa kuphela ngenketho ethi Qinisekisa i-PDF.
Ingabe amafayela ami alayishwa kuseva?
Cha. Konke ukucubungula kwenzeka kusiphequluli sakho. I-PDF ayilokothi ishiye idivayisi yakho futhi akukho khophi egcinwayo.
Ingabe lena yisiginesha yedijithali enesitifiketi?
Cha. Ayisebenzisi izitifiketi noma izithombe zesiginesha. Iwuphawu olufihliwe oluhlonza imvelaphi yefayela futhi luveze izinguquko zakamuva. Ayithathi indawo yesiginesha ye-elekthronikhi efanelekile lapho umthetho uyidinga.
Iyiphi i-metadata esuswayo?
Isihloko, umbhali, isihloko esixoxwayo, amagama angukhiye, isofthiwe edalayo nekhiqizayo, izinsuku zokudalwa nezokushintshwa, i-metadata ye-XMP, idatha yezinhlelo eyimfihlo, ababhali bokuphawula, inombolo yokuhlonza idokhumenti nezinto ezisele ezinguqulweni zangaphambili. Idatha engaphakathi kwezithombe ezifakiwe, njenge-EXIF yesithombe, ayishintshwa.
Ifayela livikelwa kanjani ekuhlelweni nasekukopishweni?
Ifayela libethelwa nge-AES-256 nangokhiye womnikazi ongahleliwe olahlwa ekugcineni, ngakho akekho owugcinayo. Izifundi ze-PDF zihlonipha izimvume futhi zivimbe ukuhlela nokukopisha okuqukethwe. Amanye amathuluzi akhethekile angadlula imikhawulo yezimvume, yingakho isiginesha efihliwe nesigxivizo sokuqukethwe kwengeza ukuhlola kwesibili.
Lithola kanjani ukuthi i-PDF iguquliwe?
Isiginesha efihliwe ifaka isigxivizo samakhasi, izithombe namafonti (ukuthola ukuguqulwa kwe-PDF). Uma kukhona okushintshayo ngemva kokusayina, i-Qinisekisa i-PDF iyakubika. Izigxivizo ze-SHA-1, SHA-256 ne-SHA-512 zefayela nazo zikuvumela ukuthi ulifanise ibhayithi ngebhayithi nelokuqala. Uma olunye uhlelo lubhala kabusha okuqukethwe kwekhasi, isiginesha ingalahleka futhi umphumela uzoba “ayikho isiginesha etholakele”.
Siyini isigxivizo se-hash futhi sisizani?
Yikhodi eyingqayizivele ebalwa kuwo wonke amabhayithi efayela. Uma ngisho ibhayithi elilodwa lishintsha, ikhodi ishintsha ngokuphelele. Gcina isigxivizo se-SHA-256 noma se-SHA-512 sefayela lokugcina futhi usifanise noma nini lapho udinga ukuhlola ukuthi aliguqulwanga.
Ngingayisayina yini i-PDF esivele isayiniwe?
Yebo. Uma ulayisha i-PDF ephume kuleli thuluzi, ivuleka ngaphandle kwephasiwedi, isiginesha yangaphambili ithathelwa indawo entsha futhi ifayela livikelwa futhi.
Yimaphi ama-PDF angenakucutshungulwa?
Lawo acela iphasiwedi ukuze avuleke: susa ukuvikela ngephasiwedi yakho bese uzama futhi. Ama-PDF anezimvume kuphela (AES-256, AES-128 noma RC4) avuleka ngaphandle kwenkinga. Umkhawulo wosayizi ngu-80 MB, nakuba umphumela uncike kwimemori yedivayisi yakho.
Ubani ongumnikazi wekhodi futhi ngingayikopisha yini?
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