Signal: Izinga Legolide Lokukhomba Okufihlekile

Yini i-Signal?

I-Signal iyinhlelo yokusebenza yabasakazi yokukhulumisana ekhululekile, evuliwe njengomthombo ovulekile, ekuvumela ukuthumela imiyalezo yombhalo, izwi, ividiyo, nezifasimende ngokuhlakanipha okukodwa kwezinkinga zokuqala ekulandelana kokubhala bokugcina imfihlo okwenziwe ukufinyeleleka kubadayisi. Ithuthukiswa yi-Signal Foundation, inhlangano yase-US engenanzuzo, futhi ixhaswa ngokuphelele ngeminikelo — azikho izikhangiso, akukho ukuthengwa kwedatha, akukho izinga elimnandi.

Uhlelo lokusebenza luphendulwa ngiwo wonke amahlangano amakhulu obumfihlo (i-EFF, i-Tor Project, i-Privacy International), lusetshenziselwa iziditshisi, izishoshovu, abameli, nezingcweti zokuphepha emhlabeni wonke, futhi luphendulwa ngu-Edward Snowden njengomsakazi asebenzisa wona nsuku zonke.

Okwenza i-Signal ihluke

Iningi lezinhlelo zokusakaza "ezibhalwe ngendlela yokubhala yokugcina imfihlo" zivikela umyalezo wakho ngesikhathi sokuhambahambaIsendlalelo kodwa ziveza ulwazi oluningi mayelana nawe enkampunini yazo:

Impahla	Signal	WhatsApp	Telegram	iMessage	SMS
Ibhalwe ngendlela yokubhala yokugcina imfihlo ukusuka ekuqaleni kuye ekugcineni ngokuzenzakalelayo	✅	✅	❌ (kuphela "Izingxoxo Eziyimfihlo")	✅ (Apple↔Apple)	❌
Amaklayenti avulekile njengomthombo	✅ wonke amapulatifomu	❌	angangcwele	❌	n/a
Iseva evulekile njengomthombo	✅	❌	❌	❌	n/a
Ukunciphisa i-metadata	✅ ngokushesha kakhulu	❌ yabelanwa no-Meta	❌ igcinwa	angangcwele	❌
I-Sealed sender	✅	❌	❌	❌	❌
Iqhutshwa inhlangano engenanzuzo	✅	❌ (Meta)	❌	❌ (Apple)	n/a
Ixhaswa izikhangiso noma idatha	❌ akukho nini	✅ (Meta ads)	angangcwele	n/a	n/a

Ukuhlanganiswa kwalezi ziphetho yilokho okwenza i-Signal ihluke. Ezinye izinhlelo zokusakaza zingafana ne-Signal ngamandla okubhala, kodwa akukho esilinganayo sezinhlelo ezivamile esifana ne-pakheji ephelele yokubhala okunzima, i-metadata encane, ikhodi evuliwe ngokuphelele njengomthombo, nenmodeli yezimali ekulungisela ngokusekelwa ubumfihlo bomsebenzisi.

Ukubhala bokugcina imfihlo ukusuka ekuqaleni kuye ekugcineni, ngendlela efanele

I-Signal isebenzisa i-Signal Protocol (ekuqalela i-Axolotl), idizayini yokubhala ngezingqimba eyakhiwe ezingxenyeni ezintathu zanamuhla zama-cryptographic:

• I-Double Ratchet — ikhiqiza ukhiye wokubhala omusha kulo lonke umyalezo, ngakho ngisho noma ukhiye owodwa ulahleke ngandlela-thize, kuphela umyalezo owodwa lo owembulwa
• I-Forward secrecy — imiyalezo edlule ihlala ivikelekile ngisho noma ukhiye wakho wamanje washayiswa
• I-Future secrecy (ukuphepha ngemuva kokuxabana) — uma ukhiye wakho washayiswa, uhlelo luziphilisa ngokwalo ukuze imiyalezo ezayo ivikeleke futhi
• I-Deniability — imiyalezo inikeza ubufakazi bokugcwaliseka ekwamukelweni kodwa hhayi kumuntu wesithathu, ngakho akekho ongakwazi ukukuqinisekisa ukuthi wathumela umyalezo othile ngemuva kwesikhathi

Inkinga ibhaliwe kahle kangangoba i-WhatsApp, i-Facebook Messenger, i-Google Messages, ne-Skype zonke ziyinqumisela ngemvume yokubhala kwazo kokugcina imfihlo ukusuka ekuqaleni kuye ekugcineni. Uma izinhlelo zokusakaza ezinkulu kakhulu emhlabeni zidinga ukubhala kwemfihlo ezikwethemelayo, zifika emnqophisweni we-Signal.

Ukuqaliswa kokubhala kwa-cryptographic kushicilelwa ngobuwula futhi kuhlolwe izingcweti zokuphepha ezizimele — kufaka phakathi izincazo ezisemthethweni zasezibalo ze-inkinga izimfanelo ezishicilelwa kumaphepha abuyekezwa abalingani.

I-Metadata: lapho i-Signal inqoba ngempela

Ukubhala kuvikela okuqukethwe komyalezo. I-Metadata — ubani oxoxe naye, nini, kangaki, naphi — ingembula kakhulu kunokuqukethwe okwahlosiwe. Igcokama lomthetho ye-NSA u-Stewart Baker wakhuluma ngobukhali: "Siabulala abantu ngokusekelwa yi-metadata."

Izinhlelo zokusakaza eziningi zigcina i-metadata eningi. I-WhatsApp yabelana nenhlangano nkulu yayo u-Meta:

• Uhlu lwabaxhumani bakho
• Ubani othumela imiyalezo nawe nini
• Ikheli lakho le-IP ngesikhathi somyalezo
• Ubukhona emaqenjini
• Isimo "lokubonwa okugcina"

I-Signal, ngokwedizayini yayo, igcina cishe lutho:

• ❌ ayikho uhlu lwabaxhumani (kulinganiselwa ndawonye kudivayisi yakho usebenzisa ama-cryptographic hash)
• ❌ azikho izikhomba zesendlalelo semiyalezo
• ❌ akukho i-graph yomlando oxoxa ngawo nobani
• ❌ azikho izilisti zobukhona emaqenjini esevatini
• ❌ azikho izikhathi "zokubonwa okugcina" ezigcinwa ngokuzimela
• ✅ usuku lokudalwa kwakhawunti
• ✅ isikhathi sokuxhumana okugcina (sihlanganiswa ngosuku)

Uma i-FBI ibhekisela i-Signal — futhi seyenzile, izikhathi eziningi — yamukela izinhloko ezimbili zokugcina kuphela. I-Signal ishicilela zonke izicelo zikahulumeni nezimpendulo zazo ku-https://signal.org/bigbrother/. Umahluko phakathi kokucele nokokwazi ukuhlinzeka kwe-Signal wethusa.

I-Sealed Sender

I-Signal iya ngaphambili ngesici esibizwa nge-Sealed Sender. Ngokuvamile iseva kufanele yazi ukuthi ubani uthumela umyalezo ukuze uyikhiphele. I-Sealed Sender isebenzisa umphako we-cryptographic ukuze ngisho iseva ye-Signal uqobo ingakwazi ukubona ukuthi ubani wathumela umyalezo — kuphela ukuthi uqondiswe kubani. Iseva yehliswa ukuba i-relay edumile engazi ukuthi ubani ukhuluma nobani.

Izimbangela zokuthi umthombo ovulekile ubaluleke

I-Signal ishicilela ikhodi yomthombo ephelele yawo onke amaklayenti (iOS, Android, Desktop, web) neseva. Lokhu kusho ukuthi:

• Izingcweti zokuphepha ezizimele zingahlola yonke imigqa
• Ungahlanganisa i-Signal ngokwakho bese uqinisekisa ukuthi i-binary eshicilelwe ilingana
• Amaphutha ne-backdoors zingabonakaliswa ngunoma ubani, hhayi enkampunini kuphela
• Izinhlanganiso ezifana ne-Molly (i-Signal client ye-Android eyaqinisiwe) ziqinisekisa ukuthi idizayini ilungile

Qhathanisa nezinhlelo zokusakaza ezinamaklayenti avaliwe lapho kufanele unikele inhlangano ngezimangalo mayelana nokwenzayo uhlelo lokusebenza lwayo. Ikhodi ye-Signal iku-https://github.com/signalapp ukuze noma ubani ayihlole.

Umbuzo wenombolo yocingo

Ukugxekwa okwedlule kakhulu kobumfihlo be-Signal bekungukuthi ifuna inombolo yocingo ukubhalisa. Lona ukulingana kwangempela: izinombolo zocingo zenza ukutholakala kulula ("bona ukuthi abaxhumani bami abakhona mu-Signal"), kodwa futhi ziyingxenye yolwazi oluqondile ukwenza isibonisi sakho.

Impendulo ye-Signal, ethunyelwa ngo-2024:

• Amagama omsebenzisi angabukeleli — ungaxoxa nomuntu usebenzisa igama lomsebenzisi esikhundleni senombolo yocingo, ngakho umamukeli akakaze abone inombolo yakho
• I-toggle yokutholakala kwenombolo yocingo — ungadinga uxhumano nge-username-noma-isixhumanisi, ukufihlwa ekusesweni "ngithola ngenombolo yocingo"
• Izinombolo zocingo zihlala zixhumene nakhawunti ngaphansi — i-Signal isazisebenzisa ukuqinisekisa nge-SMS ekubhalised nakuqinisekiswa kabusha

Uma inombolo yakho yocingo inomthelela omkhulu (uwudiitshisi ovikela imithombo, ushoshovu endaweni enobutha, njll.), umkhuba ojwayelekile ukubhalisa i-Signal nge-nombolo yesibili — i-Google Voice, i-Twilio, i-JMP.chat, noma i-SIM efonini ehlukile — bese usebenzisa lena njengobunjalo be-Signal bakho. Inombolo yesibili kufanele ihlale ifinyelekwa ukuqinisekisa kabusha ngasikhathi.

Izici ezijwayelekile ezibalulekile

Ngaphandle kokubhala kwemfihlo, i-Signal ifaka izici zobumfihlo ezinye izinhlelo zokusakaza ezingazinakile noma ezibheka njengezesigaba sesibili:

Imiyalezo eyanyamalayo

Setha i-timer ngokwenkulumo (imizuzwana engu-5 kuya emavikileni amane) futhi imiyalezo yisimahle isimu ngemuva kokuifunda ukwamukelwa. Ungasetha futhi i-timer yesimiso yazo zonke izingxoxo ezintsha. Kubalulekile kakhulu ezingxoxweni ezibalulekile: uma ucingo lwakho luphinde lubanjwa noma lulahleke, umlando oshanyaguliwe usuka.

Ukuvaliwa kweskrini

Vala uhlelo lokusebenza lwe-Signal uqobo nge-Face ID, i-Touch ID, noma i-PIN yedivayisi yakho — ehlukile ekuvulweni kwedivayisi. Kusho ukuthi ucingo oluvuliwe nolunikwa omunye akulethi imiyalezo yakho.

Inothi ku-Self

I-Signal ifaka ingxoxo ye-"Inothi ku-Self" okuyidivisi eyimfihlo ebhalwe ngendlela yokubhala yokugcina imfihlo ukusuka ekuqaleni kuye ekugcineni ehambelana phakathi kwezidivayisi zakho. Iwusizo ukugcina amakhodi e-2FA, izixhumanisi ofuna ukuzifunda kamuva, noma amanothi amafuphi — wonke ngeziqinisekiso ezifanayo zokuphepha nemiyalezo kubantu.

Izibuyekezo ze-Story

Izindaba ze-Signal zisebenza njengezikaInstagram noma nezikaWhatsApp kodwa ngokuhlakanipha okufanayo kwe-E2E. Khetha ngokuqondile ukuthi abaxhumani abani bangabona inkulumo nganye; akukho okushayeka ekudiyeleni noma ohlelweni lwabanxenye.

Izingcingo zamazwi nevidiyo

Izingcingo ze-Signal zibhalwe ngendlela yokubhala yokugcina imfihlo ukusuka ekuqaleni kuye ekugcineni ngenkinga efanayo, kufaka izingcingo zamaqembu eziyifika kubahlanganyeli abangama-50. Ikhwalithi yezwi iphakeme, futhi izingcingo ziqoshwa ngezeva ze-relay ze-Signal ukuze akekho kubahlanganyeli obabili obudinga ukuveza i-IP yawo komunye.

Ukuvumelanisa phakathi kwezidivayisi

I-Signal isebenza kuzidivayisi eziningi ezixhumene nakhawunti efanayo — ucingo lwakho (okuyisiqalo), kanye nezinhlelo ze-desktop ze-macOS, i-Windows, i-Linux, kanye nohlelo lokusebenza lwe-iPad. Izidivayisi ezixhumene zamukela imiyalezo ngokuzimela; awudingi ucingo lwakho lube ku-inthanethi ukuze i-desktop isebenze.

Lapho i-Signal ingalungi khona

Ukuhlolwa okunembile kokulingana:

• Ayikho i-fallback ye-SMS — uhlelo lokusebenza lwe-Signal lwe-Android lawushiya ukwesekwa kwe-SMS ngo-2023. Abanye abasebenzisi babekhohlwa ngama-unified inbox.
• Azikho izisekelo zamafu ngokuzenzakalelayo ku-iOS — umlando wemiyalezo wakho uhlala kudivayisi yakho. Ukudlulisela kucingo olusha kudinga inkqubo yokudlulisela; uma ucingo lwakho lahleka ngaphandle kokudlulisela, umlando wemiyalezo yakho usuka. (Lesi futhi sici sobumfihlo: akukho umhlaseli ongamangalela ku-iCloud.)
• Inqwaba yabasebenzisi encane kuneWhatsApp — abaxhumani bakho mhlawumbe abakakabi ku-Signal nalamuhla. Ngokuvamile kudingeka indaba eyodwa yokuduma (ukuvunjululwa kwedatha olukhulu, umzuzu we-Apple-vs-FBI) ukuze amagagasi abasebenzisi abasha bajoyine.
• Izici zamaqembu ziyisisekelo uma ziqhathaniswa neziteshi ezinkulu zomphakathi ze-Telegram. I-Signal ngokuqondile ayifuni leyo nhloso — bafuna ingxoxo yaqembu eyimfihlo, hhayi amapulatifomu okusasaza.
• Ukusesha igama lomsebenzisi kuyifanelo ngokuqondile — awukwazi ukusesha "thola abasebenzisi abagameni u-Alice", ukusesha kuphela igama lomsebenzisi elithile elikupha umuntu.

Ubani okufanele asebenzise i-Signal

Impendulo yangempela: wonke umuntu oshintshanisa nomyalezo nomunye umuntu — ngisho owejwayelekile. Izindleko ezingeziwe zokuguqukela ku-Signal kumngane owakhona umuthumele ngalo imiyalezo cishe zihlangane nazo, futhi uthola ukubhala kwemfihlo ukusuka ekuqaleni kuye ekugcineni, azikho izikhangiso, nomsakazi oxhaswa ukukhonza akunene wena kunakho kukuphatha njengomthombo wemali.

Icala liyaqinisekiswa kakhulu ngalaba:

• Iziditshisi ezivikela imithombo
• Abameli namaklayenti abadingelana nokuxhumana okunalungelo
• Izishoshovu, abamelene nobukhosi, nabasebenzi bamalungelo abantu kuyiphi nayiphi indawo
• Noma ubani oxoxa ngezempilo, izezimali, izihlobo, izingxabano zemindeni — noma yini ofuna ukuthi i-database ezovunjululwa kamuva ingayiqukethe
• Amabhizinisi axoxa ngemfihlo yokuhweba, emi-M&A, izinqumo zokukhetha — noma yini ezolimaza ibhizinisi lakho uma ikhishwa ngaphandle

Kuleziya nhloso, i-Signal iyisisekelo esilinganiswa. Uma ungekho ku-Signal, ngokusho uyasasazela izingxoxo zakho ngezingqalasizinda zokuqoshwa zenkampuni exhaswa yimaketiwhim.

Uxhaso nokuqhubeka

I-Signal iqhutshwa yi-Signal Foundation, inhlangano yase-US yengenanzuzo ye-501(c)(3). Uxhaso luvela:

• Iminikelo yomuntu ngaomunye nge-signal.org/donate (umugqa omkhulu wemali engena)
• Isipho sezigidi ezingama-$50M somqambi we-WhatsApp u-Brian Acton ngo-2018
• Izimpho ezincane kusukela ezinhlanganweni ezigxile kubumfihlo
• Isabelo esivela ku-endowment yesisekelo sango-2018

Izindleko zokusebenza ziyiqiniso — i-CEO ye-Signal u-Meredith Whittaker ukhiphe ngobuwula ukuthi isisekelo sidinga cishe izigidi ezingama-$50M ngomnyaka ukuze kugcinwe ukusebenza kwamanje. Uma usebenzisa i-Signal njalo, unikela ngokuqondile uxhasa abantu ababhala ikhodi. Azikho izikhangiso noma ukudayisela okungenachungechunge; iminikelo iyinodeli yemali yonke.

Isiphetho

I-Signal ilokho umsakazi oyimfihlo okubukeka njalo uma idizaynelwa izinjiniyela zobumfihlo, ihlolwe ngobuwula, futhi iqhutshwe inhlangano engadingi ukukuphatha njengomthombo wemali. Ukubhala kwemfihlo kulezinga eliphezulu kakhulu, isigamu se-metadata sincane kakhulu, futhi inodeli yezimali isho ukuthi akukho isikhuthazo sokweshelwa lolo guquko. Imfuno yenombolo yocingo ilingulingano langempela kodwa elincishiswe kakhulu ngokwengezwa kwamagama omsebenzisi ngo-2024.

Uma uthatha ubumfihlo ngokuqonda futhi unosuku luka-30-wesekhondi ukufaka, i-Signal kufanele ibe umsakazi wakho wokuzenzakalelayo. Uma abaxhumani bakho bengakabi kuyo nalamuhla, bathumelele isimemo — umphumela wenethiwekhi yikhona kuphela okumi phakathi kwe-Signal nobukhona obuphele, futhi umsebenzisi omusha ngamunye ushintsha isikebhe.