{"id":111796,"date":"2023-11-28T03:10:14","date_gmt":"2023-11-28T01:10:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovan-messendzher-delta-chat-1-42-ispolzuyushhij-email-v-kachestve-transporta"},"modified":"2023-11-28T03:10:14","modified_gmt":"2023-11-28T01:10:17","slug":"opublikovan-messendzher-delta-chat-1-42-ispolzuyushhij-email-v-kachestve-transporta","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/opublikovan-messendzher-delta-chat-1-42-ispolzuyushhij-email-v-kachestve-transporta","title":{"rendered":"Byl vyd\u00e1n messenger Delta Chat 1.42, kter\u00fd pou\u017e\u00edv\u00e1 email jako transport","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

K dispozici je vyd\u00e1n\u00ed messengeru Delta Chat 1.42, kter\u00fd funguje bez specializovan\u00fdch server\u016f a pou\u017e\u00edv\u00e1 email jako transport (chat-over-email, specializovan\u00fd po\u0161tovn\u00ed klient funguj\u00edc\u00ed jako messenger). K\u00f3d aplikac\u00ed je \u0161\u00ed\u0159en pod licenc\u00ed GPLv3 a z\u00e1kladn\u00ed knihovna je dostupn\u00e1 pod licenc\u00ed MPL 2.0 (Mozilla Public License). Verze je k dispozici na Google Play a F-Droid, stejn\u011b jako v sestav\u00e1ch pro Linux (AppImage, pacman, rpm, deb), Windows a MacOS. <\/p>\n

Delta Chat nepou\u017e\u00edv\u00e1 vlastn\u00ed servery a m\u016f\u017ee pracovat t\u00e9m\u011b\u0159 p\u0159es jak\u00fdkoliv po\u0161tovn\u00ed server, kter\u00fd podporuje SMTP a IMAP (pro rychl\u00e9 zji\u0161\u0165ov\u00e1n\u00ed p\u0159\u00edchoz\u00edch nov\u00fdch zpr\u00e1v se pou\u017e\u00edv\u00e1 technika Push-IMAP). Podporuje \u0161ifrov\u00e1n\u00ed pomoc\u00ed OpenPGP a koncov\u00e9ho \u0161ifrov\u00e1n\u00ed pomoc\u00ed standardu Autocrypt nebo decentralizovan\u00fdch protokol\u016f SecureJoin. Provoz je \u0161ifrov\u00e1n pomoc\u00ed TLS ve standardn\u00edch syst\u00e9mov\u00fdch knihovn\u00e1ch. <\/p>\n

Delta Chat je pln\u011b \u0159\u00edzen u\u017eivateli a nen\u00ed v\u00e1z\u00e1n na centralizovan\u00e9 slu\u017eby. Pro pou\u017eit\u00ed nen\u00ed t\u0159eba registrace do nov\u00fdch slu\u017eeb \u2014 jako identifik\u00e1tor lze vyu\u017e\u00edt st\u00e1vaj\u00edc\u00ed e-mail. Pokud protistrana nepou\u017e\u00edv\u00e1 Delta Chat, m\u016f\u017ee zpr\u00e1vu p\u0159e\u010d\u00edst jako oby\u010dejn\u00fd dopis. Boj proti spamu se realizuje pomoc\u00ed filtrov\u00e1n\u00ed zpr\u00e1v od nezn\u00e1m\u00fdch u\u017eivatel\u016f (ve v\u00fdchoz\u00edm nastaven\u00ed se zobrazuj\u00ed pouze zpr\u00e1vy od u\u017eivatel\u016f v adres\u00e1\u0159i a t\u011bch, kter\u00fdm byly d\u0159\u00edve zasl\u00e1ny zpr\u00e1vy, stejn\u011b jako odpov\u011bdi na vlastn\u00ed zpr\u00e1vy). Je mo\u017en\u00e9 zobrazit p\u0159\u00edlohy a p\u0159ilo\u017een\u00e9 obr\u00e1zky a videa. <\/p>\n

Podporuje se vytv\u00e1\u0159en\u00ed skupinov\u00fdch chat\u016f, ve kter\u00fdch mohou komunikovat v\u00edce \u00fa\u010dastn\u00edk\u016f. Existuje mo\u017enost nav\u00e1z\u00e1n\u00ed veri\ufb01kovan\u00e9ho seznamu \u00fa\u010dastn\u00edk\u016f, kter\u00fd zabr\u00e1n\u00ed \u010dten\u00ed zpr\u00e1v ciz\u00edm osob\u00e1m (ov\u011b\u0159en\u00ed \u00fa\u010dastn\u00edk\u016f se prov\u00e1d\u00ed pomoc\u00ed kryptografick\u00e9ho podpisu a zpr\u00e1vy jsou \u0161ifrov\u00e1ny pomoc\u00ed koncov\u00e9ho \u0161ifrov\u00e1n\u00ed). P\u0159ipojen\u00ed k veri\ufb01kovan\u00fdm skupin\u00e1m se prov\u00e1d\u00ed prost\u0159ednictv\u00edm odesl\u00e1n\u00ed pozv\u00e1nky s QR k\u00f3dem. <\/p>\n

J\u00e1dro messengeru je vyv\u00edjeno zvl\u00e1\u0161\u0165 jako knihovna a m\u016f\u017ee b\u00fdt pou\u017eito k psan\u00ed nov\u00fdch klient\u016f a bot\u016f. Aktu\u00e1ln\u00ed verze z\u00e1kladn\u00ed knihovny je napsan\u00e1 v jazyce Rust (p\u0159edchoz\u00ed verze byla napsan\u00e1 v jazyce C). Existuj\u00ed bindingy pro Python, Node.js a Java. Neofici\u00e1ln\u00ed bindingy pro Go jsou ve v\u00fdvoji. Existuje DeltaChat pro libpurple, kter\u00fd m\u016f\u017ee pou\u017e\u00edvat jak nov\u00e9 Rust j\u00e1dro, tak star\u00e9 j\u00e1dro C. <\/p>\n

Verze 1.42 p\u0159edstavuje novou implementaci end-to-end \u0161ifrov\u00e1n\u00ed, zalo\u017eenou na pou\u017eit\u00ed decentralizovan\u00fdch protokol\u016f SecureJoin, kter\u00e9 zaru\u010duj\u00ed ochranu p\u0159ed odposlechem po\u010d\u00e1te\u010dn\u00edch kl\u00ed\u010d\u016f poskytovateli internetov\u00fdch slu\u017eeb nebo administr\u00e1tory. servery<\/a>. D\u0159\u00edve pou\u017e\u00edvan\u00e9 end-to-end \u0161ifrov\u00e1n\u00ed bylo zalo\u017eeno na mechanismu automatick\u00e9 v\u00fdm\u011bny kl\u00ed\u010d\u016f Autocrypt, kter\u00fd se obejde bez pou\u017e\u00edv\u00e1n\u00ed kl\u00ed\u010dov\u00fdch server\u016f d\u00edky p\u0159enosu kl\u00ed\u010de v prvn\u00ed odeslan\u00e9 zpr\u00e1v\u011b. P\u0159i p\u0159enosu prvn\u00ed zpr\u00e1vy mohl b\u00fdt kl\u00ed\u010d zachycen b\u011bhem MITM \u00fatoku nebo \u010dinnost\u00ed na stran\u011b po\u0161tovn\u00ed slu\u017eby. serveru<\/a>. <\/p>\n

SecureJoin \u0159e\u0161\u00ed probl\u00e9my s kompromitac\u00ed relac\u00ed end-to-end \u0161ifrov\u00e1n\u00ed p\u0159i MITM \u00fatoc\u00edch a poskytuje ochranu p\u0159ed prov\u00e1d\u011bn\u00edm \u0161kodliv\u00fdch akc\u00ed na \u00farovni transitn\u00edch s\u00edt\u00ed a po\u0161tovn\u00edch server\u016f. Nov\u00e1 metoda se zakl\u00e1d\u00e1 na pou\u017eit\u00ed QR k\u00f3d\u016f pro ov\u011b\u0159en\u00ed u\u017eivatel\u016f a nastaven\u00ed \u0161ifrovac\u00edch kl\u00ed\u010d\u016f. Po naskenov\u00e1n\u00ed QR k\u00f3du v aplikaci se vytvo\u0159\u00ed chat se skupinou dvou \u00fa\u010dastn\u00edk\u016f (1:1), ozna\u010den\u00fd speci\u00e1ln\u00ed \"zelenou zna\u010dkou\", kter\u00fd umo\u017e\u0148uje odes\u00edlat a p\u0159ij\u00edmat \u0161ifrovan\u00e9 zpr\u00e1vy chr\u00e1n\u011bn\u00e9 p\u0159ed transitn\u00edm odposlouch\u00e1v\u00e1n\u00edm. D\u00e1le mohou b\u00fdt prost\u0159ednictv\u00edm zas\u00edl\u00e1n\u00ed pozv\u00e1nek s QR k\u00f3dem do skupiny p\u0159ipojeni dal\u0161\u00ed \u00fa\u010dastn\u00edci.

\"Byl<\/center> <\/p>\n

Dal\u0161\u00ed zm\u011bny: <\/p>\n