Michal Marek Makamaka mu nkhani zochitika za miyezi yapitayi Ndizosangalatsa kwambiri kuti kulumikizana konse kudzera pa pulogalamu yotchuka ya WhatsApp tsopano yasungidwa bwino pogwiritsa ntchito njira yomaliza. Ogwiritsa ntchito mabiliyoni ambiri atha kukhala ndi zokambirana zotetezeka, pa iOS ndi Android. Mauthenga, zithunzi zotumizidwa ndi mafoni amawu ndi encrypted.
Funso ndilakuti bulletproof ndi encryption. WhatsApp ikupitilizabe kutumiza mauthenga onse pakati ndikugwirizanitsanso kusinthana kwa makiyi achinsinsi. Chifukwa chake, ngati wowononga kapena boma likufuna kufika ku mauthengawo, sizingakhale zosatheka kupeza mauthenga a ogwiritsa ntchito. Mwachidziwitso, zingakhale zokwanira kwa iwo kutenga kampaniyo kumbali yawo kapena kuwuukira mwachindunji mwanjira ina.
Kubisa kwa wosuta wamba mulimonse kumatanthauza kuwonjezeka kwakukulu kwa chitetezo cha mauthenga awo ndipo ndi kudumpha kwakukulu kwa ntchitoyo. Ukadaulo wa kampani yotchuka ya Open Whisper imagwiritsidwa ntchito pobisa, pomwe WhatsApp yakhala ikuyesera kubisa kuyambira Novembala chaka chatha. Ukadaulo umachokera ku code yotseguka (gwero lotseguka).
Sizikudziwika kwa ine chifukwa chake kubisa kwapakati, chifukwa chiyani WhatsApp salola onse omwe atenga nawo mbali pazokambirana?
Mu chiganizo chimodzi - kugwiritsidwa ntchito kwa BFU. Ndi kusinthana kwachinsinsi kodziyimira pawokha, kungakhale kwabwino, koma kosagwiritsidwa ntchito.
Chabwino, ndithudi ine ndikutanthauza, pansi pa hood. Wopunduka wosuta sayenera kudziwa za izo nkomwe.
Sindikuwona kutchulidwa kwachinsinsi kulikonse, mosiyana.
Kale kunali chizolowezi kuti wolemba nkhaniyo atumize ndemanga potengera kusintha kwa positi ndikulemba mwachidule pazokambirana ndikunena kuti "zafotokozedwa".
Komabe, wolemba nkhaniyo ayenera kusintha zinazake.
ndiye ngati nditero pepani kwambiri, ndinali ndi chifunga cha nkhandwe. Cholakwika chinali pakati pa kompyuta yanga ndi khoma.
Threema
Sindikudziwa chomwe wolemba amatanthauza ndi kulumikizana kofunikira. Monga momwe ndikudziwira, komanso monga tafotokozera m'nkhaniyi, WhatsApp ikugwiritsanso ntchito Signal protocol, yomwe imachokera ku mfundo yakuti kukambirana kulikonse kumatanthauza kusinthana kwatsopano kwa makiyi kudzera pa Diffie-Hellmann ndi kubadwa kwa AES yatsopano ndi MAC. Zonsezi zimachitika kumbali ya kasitomala ndipo palibe amene angachite chilichonse panjira, ngakhale WhatsApp, yomwe imagwiritsa ntchito mauthenga obisika pakati pa ogwiritsa ntchito ndipo imatha (ndipo mwina imasunga) ndikusanthula metadata. Kapena ndaphonyapo kanthu?
Moni, sindine katswiri wodziwa kubisa ndipo sindinkafuna kulowa muukadaulo womwe sindimamvetsetsa. Komabe, ngati ndikumvetsetsa bwino, WhatsApp imagwira ntchito ndi makiyi apagulu omwe amagwiritsidwa ntchito kubisa uthengawo. Chifukwa chake, ngati wowukira kudzera pa WhatsApp atha kuyika kiyi yakeyake kwa wina, amathanso kubisa uthenga wobisika.
Apo ayi, mukulondola ndipo ndikuvomereza popanda kuzunzidwa, mwinamwake muli ndi dzanja lapamwamba pankhani ya kubisa ndipo ndidzakhala wokondwa mukandiphunzitsa.
Moni, ndi mutu wokwanira, koma ndiyesera kuusavuta - chinthu chokhacho chomwe chimasungidwa pa seva ya WhatsApp ndi makiyi anu angapo apagulu, omwe amagwiritsidwa ntchito popanga gawo lochezera pakati pa inu ndi munthu wina. Zikanakhala zotheka popanda iwo, koma izi zomwe zimatchedwa makiyi oyambirira amalola, mwa zina, kupanga gawo lobisika ngakhale gulu lina liri pa intaneti (lomwe ndilopadera la Signal protocol, silingathe kuchita china chilichonse. , monga momwe tikudziwira). Protocol ya Signal imaphatikizansopo njira yotsimikizira yodalirika ya gulu lina, kuletsa wina kuti asakunyengerereni. Symmetric cryptography ndiye imagwiritsidwa ntchito kubisa uthenga womwewo, mwachitsanzo, uthengawo umasungidwa ndikusinthidwa ndi kiyi yomweyo. Kiyiyi imapangidwira uthenga uliwonse watsopano ndipo WhatsApp (kampaniyo) ilibe mwayi wopeza, imapangidwa pazida zomaliza (motero End to End cryptography), yomwe poyamba inkachita zomwe zimatchedwa kugwirana chanza pogwiritsa ntchito Diffie-Hellman protocol ( makamaka, ECDH). Chifukwa cha kugwirana chanza uku, mbali zonse ziwiri zimapeza zomwe zimatchedwa chinsinsi chogawana, mwachitsanzo, chiwerengero chachikulu chachisawawa chomwe onse awiri amachidziwa, koma palibe wina aliyense amene angamvetsere. Kutengera chinsinsi chogawana ichi, onse awiri atha kupanga makiyi atsopano komanso atsopano obisa omwe ali apadera pa uthenga uliwonse. Zomwe zimapangidwira kupanga makiyi oterowo sizongogawana "chinsinsi chogawana", komanso uthenga wam'mbuyo. Chifukwa cha izi ndi zinthu zina za Signal protocol, zomwe zimatchedwa chinsinsi chamtsogolo ndi chinsinsi chamtsogolo zimatsimikiziridwa, mwachitsanzo, ngakhale wina atalandira uthenga wanu wobisika ndipo mwanjira ina amatha kusokoneza m'tsogolomu ndikupeza chinsinsi chachinsinsi, sangathe. tsegulani uthenga wina womwe mudatumiza.
Ndikupepesa ngati ndalemba izi mwatsatanetsatane ndikubwereza zomwe mukudziwa kale ndipo ndikuyembekeza kuti ndayankha chisokonezocho. Ine sindine katswiri wa cryptography, koma mwangozi ndakhala ndikuchita ndi mutuwu mozama posachedwa :) Komabe, ngati wina apeza zolakwika zilizonse zomwe ndidalemba, ndingasangalale mutandiwongolera.
Zikomo kwambiri chifukwa chazidziwitso, mwafotokoza momveka bwino. Nthawi ina ndidzakhala ndi chidziwitso;)
Kodi izi zikutanthauza kuti WhatsApp ilibe mbiri yapakati pano?
Ili ndi mbiri yapakati, koma uthenga uliwonse umasungidwa ndi kiyi yapadera yomwe wolandira uthengawo amakhala nayo.