antarjaateeya dayta encryption algorithm

guudha lipi saastramlo, antarjaateeya dayta encryption algorithm (aalochana), modata merugaina pratipaadita encryption standard (ips) anie piluvabadedi, idhi eth jurich mariyu juezia laay yokka james massie roopondinchina cemetric-kii block saifar mariyu dheenini modatisaarigaa modatisaarigaa vivarinchaaru. eee algorithm dayta encryption standard (dess) kuu pratyamnaayamgaa uddesinchabadindi. aalochana anedi munupati siffer pratipaadita encryption standard (pess) yokka chinna savarana.
ascom-tech aglo bhaagamaina hasler foundationtho oka parisoedhanaa oppandam kinda saanketikalipi roopondinchabadindi. saanketikalipi aneka deshaalalo patent cheyabadindi, conny vaanijyetara upayogam kosam uchitamgaa andubaatulo undhi. aalochana" anae paeru kooda oka trademark. chivari petentlu swatantramgaa gaduvu mugisai, mariyu aalochana ippudu patent rahitamgaa undhi mariyu anduvalla anni upayogaalaku puurtigaa uchitam.
eee aalochana chaalaa manchi gopyata (pgp) v2 loe upayoginchabadindi mariyu v1 loe upayoginchina asalu saanketikalipi, basomatic, asurakshitamgaa unnatlu kanugonabadina taruvaata cherchabadindi. aalochana anedi open pii. zii. pii pramaanamloo oka aichhika algorithm.
operation.
aalochana 128-bitt keeni upayoginchi 64-bitt blacklapy panichestundi mariyu 8 saaruupya parivartanala shrenini kaligi untundi (oka "round", drushtaantam chudandi) mariyu avtput parivartana ("haaph-round"). encryption mariyu decryption kosam prakriyalu okela untaayi. modular adanamgaa mariyu gunakaaram, mariyu bitwise pratyeka ledhaa (xor)-ivi konni koonaalloo beejaganitaparamgaa "ananukuulamainavi"-vividha samuuhaala nundi karyakalapalanu vidadeeyadam dwara aalochana daani bhadratanu chaalaa varaku pondutundi. marinta vivaramgaa, 16-bitt parimaanaalatoe vyavaharinchae eee operatorlu
8 roundlu tudi "haaph-round" vacchina taruvaata, diguva vivarinchina avtput parivartana (madhya rendu viluvala marpidi chivari round chivarilo maarpidini raddu chestundi, tadwara nikara marpidi undadu):
nirmaanam.
aalochana yokka mottam nirmaanam lye-massie pathakaanni anusaristundi. xor anedi vyavakalanam mariyu jodimpu rendintikee upayoginchabadutundi. aalochana anedi kii-aadhaarita ardha-round functionnu upayogistundi. 16-bitt padaalatoe panicheyadaaniki (64-bitt block parimaanaaniki 2 kii badulugaa 4 inputlu anie ardham), aalochana rendu samaantara round functionlu okadaanitoe okati mudipadi undadamtho rendusaarlu samaantaramgaa lye-massie pathakaanni upayogistundi. taginanta vyaapti undela, prati round tarvaata rendu upa-blaaklu marpidi cheyabadataayi.
keelaka schedule.
prati round 6 16-bitt sub-keelanu upayogistundi, ayithe haaph-round 4 nuu upayogistundi, 8.8 roundlaku mottam 52. modati 8 upa-keelu neerugaa kii nundi velikiteestaaru, modati round nundi k1 diguva 16 bitsga untundi; 8 yokka prati group madhya 25 bits migili unna pradhana keeni tippadam dwara 8 keela yokka marinni groupulu srushtinchabadataayi. antey, idhi sagatuna, mottam 6 rotationla kosam, prati roundku okasari kante takkuva tippabadutundi.
decryption.
decryption encryption laaga panichestundi, conny round keela kramam vilomam cheyabadutundi mariyu besi roundla kosam sub keelu vilomam cheyabadataayi. udaaharanaku, k1-k4 yokka upa keela viluvalu sambandhita samuuha operation kosam k49-k52 yokka vilomamtho bharti cheyabadataayi, prati samuuhamlooni k5 mariyu mariyu k47 mariyu decryption kosam k48 dwara bharti cheyali.
bhadrata.
designerlu differential guudha lipi vislaeshanhaku vyatiraekamgaa daani balaanni kolavadaniki aalochananu vislaeshimchaaru mariyu konni anchanaala prakaram idhi roganirodhaka shakti anie nirdhaarinchaaru. vijayavantamaina sarala ledhaa beejaganita balaheenatalu nivedinchabadaledu. anni keelaku vartinche uttama daadi aalochananu 6 roundlaku tagginchagaladu (puurti aalochana saanketikalipi 8,5 roundlanu upayogistundi). break" antey 2128 kante takkuva operations avasaramayye edainaa daadi anie gamaninchandi; 6-round daadiki 264 telisina plain text mariyu 2126.8 operations avasaram.
avasaram broose snear aalochana gurinchi ekkuvagaa aalochistuu ilaa vraasaaru "naa abhiprayam prakaram, eee samayamlo prajalaku andubaatulo unna uttama mariyu atyanta surakshitamaina block algorithm idhi."(" "uplied cryptography", 2 va edition ".) ayithe, 1999 natiki vegavantamaina algorithamla labhyata, daani guudha lipi vislaeshanhaloo kontha purogati mariyu patentla samasya kaaranamgaa athanu aalochananu sifaarasu cheyaledu.
cheyaledu meat-inn-dhi-middle attack dwara puurti 8.5-round aalochananu vichchinnam chesaaru. swatantramgaa swatantramgaa, munupati biclicla daadi prabhavam maadirigaane, sumaru 2 bitla guudha lipi shaastra balaanni tagginchadamtho, irukaina-biclicla daadini upayoginchi puurti 8.5-round aalochana vichchinnamaindi; ayithe, eee daadi aacharanalo aalochana yokka bhadratanu bedirinchadu.
balaheenamaina keelu.
chaalaa saralamaina kii schedule aalochananu balaheenamaina keela taragatiki lobadi chestundi; pedda sankhyalo 0 bitlanu kaligi unna konni keelu balaheenamaina gupteekarananu utpatti chestaayi. ivi aacharanalo takkuva aandolana kaligistaayi, avi chaalaa arudugaa untaayi, avi yaadrucchikamgaa keelanu utpatti chesetappudu spashtamgaa nivaarinchadaaniki anavasaramainavi. oka saadhaarana parishkaram pratipaadinchabadindih 0x0day vanti 16-bitt sthiraamkamtho prati sub keeni xouring cheyadam.
cheyadam pedda taragatula balaheenamaina keelu kanugonabaddayi.
yaadrucchikamgaa enchukunna keeki idhi aandolana kaliginche athi takkuva sambhaavyata kaligi undhi, mariyu konni samasyalu mundu pratipaadinchina sthiramaina xor dwara parishkarinchabadataayi, conny avanni unnaya anedi kaagitam khachitamgaa teliyadu. aalochana kii schedule yokka marinta samagramaina punahroopakalpana kaavaalsinadi kaavacchu.
labhyata.
aalochana kosam patent darakhaastu modata mae 18,1990naa switzerlandlo (ch a 1690/90) daakhalu cheyabadindi, taruvaata mae 16,1991naa patent sahakaara oppandam kinda antarjaateeya patent darakhaastu daakhalu cheyabadindi. petentlu chivariki austria, france, germany, italii, netherlands, speyin, sweeden, switzerland, united kingdamlo manjuru cheyabaddaayi, (, mae 16,1991naa daakhalu cheyabadindi, juun 22,1994naa jaarii cheyabadindi mariyu mae 16,2011naa gaduvu mugisindi), united states (, mae 25,1993naa jaarii cheyabadindi mariyu janavari 7,2012naa gaduvu mugisindi) mariyu japan (jp 3225440, mae mae gaduvu mugisindi).
mediacrypt ag ippudu aalochanaku vaarasudini andistondi mariyu daani kotta saanketikalipi (mae (mae adhikaarika vidudala) aalochana nxtpy drushti pedutundi, dheenini gatamlo faaks anie pilicheevaaru.

