ase wi o eae SOE & 6 — Cach block can heve AE en. i N Expt. NOw oes 2Ravvrnnrse Diat nsosnoewesneenoeereons Page No.... Syormebic a pe - x Block &pher pHociples ; ee. oiegh eee LL TSE cs an encryptten | decryptoo Scheme fs tveale A as & — Block Cfpher os to which a. block of plafotert L block of GB whole e wet © Pr a cipher 4 eguoh Length . a _, To Convest plafo texk goto céphes fexk, plese tent ts dlerded nto no. of block - —» Where end dasa block cot Indsvidual cipher text block - ex- abedef —, gererake an! as c i 4 fauls a sexe of (40,56, 64, (29, 256 bets) ~ ad : — Whenevex we WC deedtog ne nent make Swe tral the plaf text block’ Stge % egual bo the cipher fexk block sige’ > By viog the key’, the | plaPs text “blocks ame blo cles 7 we Converted eno cepher ext block» | WC Signature EAMCET CODE : MRIT JNTUH CODE: SIOma text hlocles ees th[aL LLL — plofo text pe Rece? vex Beck es Rng | (desego w) ; — When we me dura ntog a Hock cfphex, coe need follow three dean prodples : = They are as -follo'cos &| 1) Number of Rocincls 2) Des’qn of functPon F ' f e D key schedule —Alg ortho» i) No- of Rounds fe = Every algorith en conststs. tn wousous Low ke pencling on the dtqnfog of the Algorithyy . [/ — The 4% the wound %%, the kougher fy seo aes tor the hacker to break ft ° Ex 10K, 1ee, 2OR (ao -t8s POR GS Ioucler ial | log}. Jb ‘ i LEB BLT [1p teste i.i) @ tes ‘, Ae Wie MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE & (NS Expt, No. Symmehse heey ~ ik only yeguives a Stogle key toy both enewption & decryphon — The Sfge of cephertert ig the Sarre Or Smaller than Ihe Orfgfoak platoteet — The eneyplon process fs very fast: 7 Ik % wed cohen O daxge amount of dota needs to be transferred - — Ik only prowdes Ps Conftdentiolity : ' + he heng th of key Ps. 1Q8 Or 256 bib — The vesouce ub leak ~» #¢ how compared Page No.....©.6 Ps ymmcbie bex — Tk vegutres boo leeys, o publte bey 4 a private key, One to encrypt & the other to checrypt ~7 the Stze oF pherkrt| fs the Same or tasger than the Ovigfinch piafolet I The rereny pon prees fs sloc- —y Th &s Wed to transfer Sra amount of dale - bo tt provides conffelenticr — The kengih of key > the verowurce Leh: sabeh whey, curthentfet Ey ras non ve putoliakion Used: *s 204% or higher es heat. “WC Signiiture Lo ay rmmel8e ee ‘ rT EAMCET CODE: MRIT ~ JNTUH CODE: $1! Symmubte ry Pky ruredinc bey | 1b) Autbenlrcakfor Regetvennents 4 > Ub & effectenl as toy dosge amount of data eo wed] 4 Ze ¢s 26 less ef Pecfenk as tk can haodle a Smalk yn amount of ‘coke ‘ 5 Seussly ¢s Koctey at only | Secuthy % hégher a two One bey PS uted for both leeys ae wied, ene for rent ie a ee eneryptoo % other for rere decryption ~> “There ave clfterent ‘kd of attacks fo the, conlert of communtcakfons. acrost a Nieo- They ore. OR follocos 1) Décclosure 2. Tratlec analysts 5 Contreen abby Mas gucrade Content modi cation message Ge Seguence modthrcalsen Authencatton | Tmtag mods hrcalo O, ee | Source sepucfakfon Sqnakene. = DesKoalon vrepuoltalion et HN y fw SpeePatesca DigteL Rgnahee Le Dicdosume + Release of ein ements +o oy person a. Trobe Bie aolyss Di covery of the pattern of trate blo puke -Expt. No. ... & ey Date ... >) Masqueracle | Aoserkton of messages nlw bom a Source | : y) content med? coke n * we MMALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4 Page No... 2. foto the. changes Lo the conten oF a mesoge , tocladin g, enterton, ldlet on Se modi berks nS) Seguewe modify cobson = Any modthcakfon FO 2 sequence of mersoge blo potier encluding Fee) deletton & seorckertag i 6) Teetog mnodihecalso o'- Pelay ox replay of menage: 1) Source Aepudtation = Lf Pt ~the tromsertssfon OF ea hy Source 7 8) Detk&oallon repudiation = Dental of receipe of message by dulinetion. cradbnes) Mesage Aubheolicaluen > ee procedure to verfty that Aecefued menagey come hom the dllegedl Source % have hot been altered ; j <3 Theve are Hhvee funelont of "cpr Pahentie hoe “They ate OA -foleros ») Messoqe encry phon ss 2) message pruthentiobion code (He) 9) Hoh fundion VC Signat jignature EAMCET CODE : MRIT JNTUH CODE : SI; 5 ; | iA etegatee @) Heqttel eq ve a5 ik thre As ynmelie bea eryphogreply Z — Piagflal sqretae 1 crypeomrerplte Teebntgee cried +o verthy te Prdtranttly u atest] of Digitek doc O®%8 musage - ’ > i Ienclver Une Cure of (PBvode leery to Sign tte doc %&_ coves ponding publ?e key to veahy the Staneluve > Tek means privedc cey fs ured for encyyplico € > Prd publfe ey Ps used for Decrypbon ’ 5 th ts ued for both cuthenticakion Ef POP = sepudltolfo'n ‘ @ Aothoriieslion Ib ft cued to verily ia menage otiten te ps sent to the covreck pexon O° nok - Neo- Repuctiakion se 35 aclerred a8 the pesen rrecefves the ressoge Cannot eke bor recor tx: plonspaad ia po pa . Stonsduae > es a prook of toletcly , to Knew Hat eo Exvorn the Correck Seroler /not « 7 > Buk the bigicel segraliune cLoes n't _provicle conk Leah Communities - ; who; f ! / $e a Ne MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE Expt NO, OR, Page Now O.2 aves ; \ ‘» Destan, of -funckfoo £5 > We must oles?gn eb eee ron which must be Complicated to unduxtanel —for +the hacker. > he hada -the tunclfoo 9% Aekgned, the wove me the hacker takes +o wae or dececle the Algoxithm — > Noo- boeas functions Ue, prelerrect vatber drown Moeox functio a ° ; a 3) key schedule Algosthm > —s» We mutk be Coretul cohtke we bore, gensalig | — Though, a wvtauke chosge $0 to key; dhe hole “Algor hrn ge’ ee leet + Modes of @lock cfpher ss —_— The modes of operon of Block cipher - Elechrongte lelesk code book ‘ ; ) €ce - 9 Cac - Cher block chaforag « ) CFR - Cophex deed lecrcle a ore _ olp Feet bacle s) Ctie- unter VC Signature JNTUH CODE : SI EAMCET CODE : MRIT————————————————_ — : (a ) ae. 1) Lleckronte code book (<6) = = — ie, 3 The flafotext #s deidel roto no of blocks, ; encrypts the plafo fert cotth the help of the eay > Theo cfpher text fs gerertec, agato by ehrg Ha (ker chehe» fer to pleto fern: p Oe coo decrypt the 5 — | > Thes process oll contfoue upto Po S 5 The prepesven’ axe t) Glock stge Ps egual to ou pi ) bey $8 Same fo everyeohere* : 3) The S83 of PT & CT Should be Same - s 5 Fes eo Ce oy Show esteget wien — loo Lit bey eye ge 7 Oo 7 2) Cipher block chateto g (cae) : 7" : = The olp of the XoR epercdoo bho the plato text gy Forltaligaloo vector, °S enlevec @ a Vp - 2 The Enoyplion proces fs done with’ the help of | bey &% Ip mn,MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE Page No.....Q.3. Expt. No. ... : Date ......:-0-sees0000 the cfphes tert fe generation. ; t the, ciphexlex £ worth => After encryption , — Then we noect bo cleory | the rel p ot the key~ 4 Agofn that oF Totgalsgatvon vector, then we get the approach ¥OR worth the | plogo. text ¢ —> fos the next Shep, we We wrt peo Cfpber text as a “oilteligation ve choy = Ths ‘proces orll CONF oure upto, Po ine _ > fori Po the Cp., ofl ackagh & Srsifaiteakog vector Fi VC Signature T : MRIT EAMCET CODE : MRI JNTUH CODE : SI) Ciphex feedback (cre) + — In thes we have Shift Regester- The sfge of the | ghett degi ster es bits —4 —s The (gr'ge OF (plato tare es? S “bik — We kil encrypt the nubyis ‘Of +he top veg?sier | Mh he hele of key, then coe Weil get hero 1 oe ets of cfpher texk v ~~ Acdually the sfge of the plain +e 80, hom that § bits we have, +O Select whe Shessabs, ; | % | MSG C Most Signteant bk) - /— Fem the ‘n’ bits of cépher text , We musk check that Counter SPg@ PS eguall to the plofo text Sige ov nok SIL es Stmelar to Elechoo%e cock boolc : ud eH a VC Signature EAMCET CODE : MRIT INTUH CODE : S1> Whe Bunter wll be encrypled wth the help of | key, the BOR operaken colll be doe bf the ley plafotert (P,) then we gek a cipher ert Cc,) = DH acs to get the Platoterk we Needs to Perley yerwerse © pesalkion » — for every vexk Sep, the counter will be aclded (01) sreeorented cotth | — fey the vl step, the Counter es Counley 4n>I sae Te | Tres proces tl coniave - 2 : *Xe MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4 MRITS E S ihe Per Garapben > 4 pad, ofp & key O3¢ YU 6M bib, The sel xpt. No. .. CS Page No..8.9. DES_Algrrith 4 065 Stanly fry date Gronphi7 standard 2 u wa Syemehic bey biock Cipher 3 fs wo Symmebic Key vthe same ola & hey 6 used fr eacoyptun & decyprtn ; > plain teal ~ C4 bils } cipher text ~ 64 Sib : a no-ef mudach ~ 16 bey sze ~ 64 bib / yous + ter cach rund He ore proricla fub bey of Si8¢ us bity ; i Ke 4 The cocryphyn prey 1 mode of tuo permutchay chih wv tothal & Food pomutetons ' > pes we both teoas porn & Subshtuten. & Sum efny aetlered +0 a procul Gphev, : a ou bis ax aeltered blocky 3 the cphey Gmnyetls d 16 Mund mv thevatey Cech rund wits a seporale Icey + Mt bik ea . Signature EAMCET CODE : MRIT \ JNTUH CODE : SI rane 2 fg + B€1 eoonyphen algorithn tovere tito) eoonuka hen & —— ; Cipher tent (64) > 10 FG. Fost the cu bik pleon teat poates thwugh 00 thal Perouatn thet *camreye the bi ty produce permuted Up, + Thea ther ia phare of Garis hop 16 “waved of Same Func cahich towdrey beth Permutaha ¢ Subshhihar (" wd Gosh of Gy bik, The left ¢ wight halver of Pre- ofp. 4 The ofp of ofp ovr Susapped to PrcdluceMALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4a 06 age NO...iileacwae Expt. No. Date Page No. | r baba Mn + The pre -eutpat v poured thowuyh royent (+o 64 ¢ uo 34 3 st 36 4,3, 4 $3 -to ‘alle cu AR sold y 8 2 ‘ bi, Cipher tenk.” whol peut + > The fp to table Ganit of Sf 86 oO 62 at st 84 4 63 Mig uh ois ae NY Ww 8 wine wou 4 ty a 4 s2 SY 6 a oa 33 SS. tovene rattiol pampataheny 373 ee Soe 42 4 MC af a ua ar a cu 3y ae 36 8 33 gts yo 32 33am 3g 37d sq St oy 32 ao 3 @ 30 6 24 oo 28 si 2? HW 26 st ot t 3 20 2 24 tt 19 21 23 bib numbered fw 10 Q y re q it B iS g 4 ¢ 8 ' 3 a 5 4 # VC Signature EAMCET CODE : MRIT JNTUH CODE : S1 7; : fig: of DES algovitha. a. i Shorey w Fuac’ (¢ & > te ee Ce ped jes2bt J + The lelt ofp Ga Sienply Gry do ved lp (&:-1) Kae A he yh ofp (ke) uv Simply Kor of lee lp Cur) ¢ nigld Mp (ea 1 TO pert nt P ). Si ) Es ta | hay. LL Fae ey Gl 4 shone ic 6 bib @ Dp ¢ vu bi ay “i Roe SERS Eg eeemoncmm aman.a es AES _Atgeien > aes (Advonced Groyph stendond ) ~) Aner & @ on ferttal «Cipher thel cacy a doty block ot ‘top Sty - 5 tey 196-129, ae oy age BNW Cleperds 99 goed vende) sur 4 tt fey 4) Round Key addition = The th ay ty tooyptyen & decyphm algo 's a Sugle ton Ait bloc ee * A Alneeteze YO seprercatef 101 & wma of cyahit of (6 by tet : > Acs. we Several wounds va which Cack qwoad mode od several shapes. WC Signature MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE <3 Expt. No. .... a Dele... 2am Page No. OF. oreo J EAMCET CODE : MRIT JNTUH CODE: S: oesSS ~ Pata bloc t troutfmmed Bre one Claye A oauther » Hene Dota block y vetmed to w Stat. 4 Block uv Gpled for State which 4 modiheok ef ach staye ob ealmyphn © eomahy -} altor tho Bool dteye, shett te Copied te on elp Mahan, . Plain tent Key lam tere a [Aad vaued tey ae: [eovene Sub Dyke | hreveve Shift rss Chil wows fAdd ound bey Cipher ten{ws MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4 MRITS. Expt. No. Date ......! Page NO bee GB! deere nes Shuctune 9 90k ferstal sbrctu expanded toto ~The Key the & prided ay ipo ch osroy to!” 44 Ret ward) iI « 3 fur ait Stayer ory, weds, ONE al prrnotehn § sheee Subshtuhoy the ciphey begin wf ane cpouds roth wud hawt 3 fey bith Enoryphen ¢ decrypter \ Add Eoucd fey Stoye follwed by at have four Steger excep! the three stats only Add Gourd bey Stage, erate wr of key. > Gch steye fe easily acvers (le + 4 the decwp tor alpo mate, tial ol. enapenele! oy ln wevenc onder ejhablihed toh ol, Peer Heyer or Jy one. teu vy eay to apnty hot decrypt severe, 4 dea Crt the plave tent ~) The final wound ch bth caoyphm & dlecryphen Gost of 8 shogey, VC Signature EAMCET CODE : MRIT JNTUH CODE: S1 OO necennenmeeee Jht eee : BlowAsh algerithan Fh § 0 Syamehte biect Cipher teal Ga be cued ay ¢ Imp 1 arplace meat fa bes, & DEH a 4 take a yvewalle levy tt Sy Bury 22 to Mn, bit & dekank g bbs > Th begs ore Fired 19 3 bea P es ei, Up se OW PS Ga py > The cubskey one Ghoved 19 p- annoy VRS. A Yy € 2 Ayre ar fuuy S-buves Each wlth are 3a bil cones > tt we UC youndy FD Brat the gieal key tab a Wee ot Subkeyg he & suka | ond four 22 ba og boves The I hile oc Shor | ; A ther Wo P orray ¢- ervey Contos UP = 3 bib Subteys , : Gatoms 256 eahiel, : } ; | | FT Blowkeh har a Cy bit Mock sige” aad try ‘ian . onyuhee fon 32 BH te Uy Cy HH wa. 6 wad Fula ciphev Oo wes looge tey | depended S-Lones 4 the bdow tp mdi@le Whe oche klesPoh fol, bac repre cab 22 bk. 752 MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE MRIS Expt. No. . Ditesc ity teenetunsort a FASE Bie (09. x,t... Sagat bd ie, &.) 1 Monee aes i i i he foes glo wtish ee j alyrithn fr *] fs | \ \ 4 cthetig bape ate Poa pub ond produce 32 til output . ? Gne eoby ct the fravtay 8 wed every avaed, orc alter Final sound, each half of the data block ys x-oked ustth one of the tuo meme loin eared P-eahieg, 4 \aiholae the pearray avd Gboes. Thera XoR p-orvay woith the key biks VC Signature EAMCET CODE: MRIT JNTUH CODE : Si| 4 ue thy enettad te cocnipt the all -2cv0 shag. cielo) | ofp WU pow p oad Pr | ¥ Enowp! Heo new A ond with Abe moclrbied Subkey 5 5 nd 0, hy oew Wp " aw & 4 y 4 Subteye Pw Prany F beopel srt me 19 ode b Gl a eos 7 And four s- benes- yo Fetstal of) | tt Cos ke tovertecl 2 Sace Glow heh to cipher Smply by KokMG Pr cad Pig J Blowfth -tunchm: The fund thot spl Le ila 4? wir for Cy bit quorfere © ever WisplegtaRe cy pt s-Lones ote cade! aad KOhed to produc dhe final | 32 brt dp. Slot ebib shit gbib g bits L x 1 “] Ee CH) Ey [af Ba bits . 4 32 Ak4 R05 Algostthan © —> Re Standls for Cfvest céphex —>reee clestqnect by Ronel Crrest fo : > RES everyption allgosithen 4S a fast, SYromebfc | block cipher Suftable tor blo & she renplementalfon. length 19% > kes ererjpts bloctes oF phiolext of : 32,64 0» 128 bike oto blocs of cepherkext of the Same feogth - — tthe lkeey tength anges from Oto 2040 brs 3 Tk 26 a Symmehte | block, exphex cohich mors} = the Same Seorel Bey peur) Soeeloe Hh) <1 Enemyplfon & cleeryphen - — ecs, cools of Hare pouancers - They Gio F R Ee Detentto o Allocaalle values w “void #30 fo BS)] 16,33,.64 Ror ency pls B-wovel bl ocles ' i De eeier atoll Osis avs Z No: OF by tes . 4 : 0,1," +. atg= +e Secvel- key le VC Signature F EAMCET CODE : MRIT JNTUH CODE : SI— res ener pion algo ss om eS Simglaxr to Bg wore, mmbouke let Peronces —> RBarecl en choowag ‘co’ setetntng wel be bared. More vouncls provicles an Prurearect evel at Seeustly . © —3 RCS ConsPote 4 Cx vee Cop EL ne que i © a key , Len algowtim , — It follows three steps - | — > Tk Converts Secrel tey byt to worels — Fk Aopbeoltger the Sub key Grrowy S. | Be mix Ye Secret key! frto cub key away s- ,wa MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE & MRITS- Expt. No. .... Date Page NO.eoeebdesoo Enexyptfoo ’ Plafoterk (obit) plosolest (oto bits er st | std so leap: er Leo efo . Pound (3) Het. Secure hy- "Sales WC Signature EAMCET CODE : MRIT JNTUH CODE: SiMALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE a Page NOwerwel Bsssersnrey | Date ¥ ——— = MRITS: Expt. No, ... Py tae tghernghmnol bata Eacryphien Aly mada block Gpher. d ‘ele sae. 3 th ha 9 mounds. 5 en wey 12e bit "| 3 wer setoer oat wer So beter fy yourd Fine? ditt mathemnerhcal opevatas) » binary maulli pliqahieg ith Ct0CA) a D2 pea velid on KOR binary, addihun of (6 bits Nabagiert one ot (G6 Lit tntegers. wn Such oe OY ty to prduce a loenplen Bet ci ee brother) Chota aly Ati cult ty onelyze € hence’ vew defialt! te: Gritenalyae 2 Tere Funct ave Gmbined ‘ 45 a Shuctore of IPEA, Kaa Ke by Xr a VC Signature EAMCET CODE : MRIT FNTURGEDE ESIthe basic Suche of 1068, “WEA wer dhvee 3 Ry hows tq ${0, to Greate © Mapping op craton all cary ty Gonpule -] The 12g bik Key 4 exported raty S2 bis 16 bite, t,t, ame 4 The key eupensien tr deve etficteat iffereatty fy 24 Gun ben thea Fo Aecoyphon compte & decyptan eperahny ge Some one the 2 bey oor grarvoted wet perfnared tn pounds. UH hey TP noctads thert the odd numbered ioendt. 1 ditt Arn even numbered rounds Gindev- xq ty ¥ Xd um es te dhe eC ake ds ut Xa xe X xd ty ve L L J = > + tte Mey +4 Jd Xb —_ Xq faq odd ued, Xo = Xa (®) ba Xe 7 Ke t k& Xo = Xb + KP Xd = nd) td Eve round + Gasedey 4, a Bec tq te tf Yin ~ Ka @) mb Fo > re O ed VC Signature EAMCET CODE : MRIT JNTUH CODE: StKq fig rh und Xa - Ka@ you “9 _— pee Oat Where: Xe = ¥¢ @ zout vd 2 gee Youd + (Ce Of) +) @ ke Feat: Cte@ Yin) + Youp DEA Uy Clemeity cleveleped Gn =" So thot 6 Some Code © per Fores etthey rahe & Secryp tus ‘Cc oa. \cas SMALL REDDY INSTITUTE OF TECHNOLOGY & ScieNGe a Expt. No. ...... es teen oe PAE NO rset te errr Stream céphexs — There cure vouvous enevy ptfon techutgueg / +0 : Comet plninter’ alaosthens, Srearn cfphes PS Ore of those techdgues * =) Sheam cepher enurypls plafatext eee by applying an eneypion oulgo~ no, a key sheou, - tind les I ee) K 4 ‘a 6 ae — A Seon efphex) enoypts. Salter, block of dota, by Beth or bytes: ; —7 A key Stream geoerctor oulpul a Shroom of} bee k& ka icy. ke: = hes key Shreem °% KOeed tof a Shreay of pofobexks bers P, Paps Spe to mocks Skreom of Cipher tert beh. : — Then the cfphartext bts are Kore torlk oh key $ trenn to gererecke plesntext bel. WC Signature ~ EAMCET CODE : MRIT JNTUH CODE :SI™, m2, my, - -- me -plofo feat” @ “ke ky - - - bP keys C Ra p'- -- Cy cipher Sex Eka ida pares HoOlll oo jan P, PBS wie / @O10l O11} Oo OLY st lig ee yy HOOT LOOl Olis¢ a Wisecbalyes HO!0l O11 1 OO5€ a) Sy ea 2 Be Sein. 1100111 COT ye — Xo erroy $ Ex ecy Nyortlhiog REAL gor Haro > ie aq bak example Ob Sreoum ephen. - — 50, eneygion & desrpson % ey the fom 9 biks | pytes | : : > Rey Algos fen hos 2 Steps > | ® os SehecidFog® | © key Shean qrreradton i ® Enemplicn & clecryplfon 1 (® b ety weal & | > No. of Heraloos ae egual 6 the se of | S- ray. eMExpt. No. fosl€ alive 5 ° fox @r0 ko ass AO $= tae sa) 4 TC) mod 26 geoap (SC), 8D) ; there, st — Stale vector aCe} key onery Cherporory vector ) Exampe Saray = [ol 23 > an key omoy = [12 26] plato fexk= rico 20a. } . Viwotth key * Totbfolese Trae TS x To frame aed } 1). se6 ts) f20 Eon? lees tor f= bo j- [o+04 Vmod 8 fe [isora) 5 - eae ge amod & ; i swoop (s@), sc) Swop (s(0,8@)) era gur 6? 30 fa g-[roasus 69) g-[t32ouse) > we need to upto gh ayerehen - EAMCET CODE: MRIT Page No... ae a 55 ] ee i j+ [axats] 5:8 mod ¥ gro ; swap (s@), ©) &- [23lovs ely VC Signature JNTUH CODE : SiRee: ) & bey Stvearp qeraralfon ~ ap ths the no of “terakoas the Brae Ot the aH Br =0; cohsle (Tree) Fe (P4i) mod ave ; $= G48) mod ase; Swap (sc), sg)); * = (s01)45G)) mod ose ane eguol to b= sca); — te is ae tor cotll get the kexy oe. * Hleraboo we get k Co) Pe | 4th Cegy — At [asl nes key % obktaroe & wed +o, Eneryplon & i. © Enery plfoo & Boo ; ~ E-—+, PT xoe per tery Be cr Kor neo bey: > 3S thts tnt “ne Gaye, en Convert the Pr Sod | Yeo kex 2m to braasy ; Then PT © NOO1\O0F key O1O10111 69 3 ae ee 1001001 oy eA DL 5Se OO ne a ae we MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE © Expt. No. ... hun [Date slam PageNg of | —Asy mmelyic key cfphexs = Pimegles of publde bey cyptosystern’s + — Te is on asymnmelyhe bey alge . cp toy enuyphoo — de depeods en two a decryption - . C > Tu 400 feely sate — @puhlee bey @ private key: oF Lectrer ae rt Jee ee * sini ale 3 | 2 plafotert | > cipharlext re exchage . (pubite Key ) C s) The Kx0 mag prodples oe - © Ackrenleabion « ® Data Conkidenbialrby. OM Duthenlecak?o9 $m —— — the ker Source por bat fom +e dame oO i ia widely Ate Ween TE bes he priv q pub le VC Signature Soure - EAMCET CODE : MRIT JNTUH CODE : St— In AS We wre AP Le vent bey Gowyees > And ewe Lo enemy plfon Lepo ~Henes© 2) Glalate 9 ~ pra” SS MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE | { MRITS, Expt. No. .... Date .. ea 9 pp aBe NOR... NR. ca RSA Ag evithen - > Risk shanty Pdlemag CRA) ts a block, cipher which ty plantert & Gopher tent axe tatters blo © ond nt far Come 'o’. a F EM algo tt paslics key cocupher type ogo > th Hts algo ME Wer UES & pubte bey & othev wer user ce Secvel Cpnvate key) tey ; D ta the Pra algo €ach Slabun tadependently Chootes teoo large P and y. numbey and 9 al plies them produce: ney , 4 & Yond fey geneity ) pice two large Qumben r ol oe 3) Gladake 9@)* (-0C4-) 4) flee Fo Hhol ged (Gio) ,¢) ee ees da) s) Glolote dm tet dee mod (a) = 1 ) Get public Hey by = feny 1 Gad pravale bey fp > {da} VC Signature JNTUH CODE: S1 EAMCET CODE : MRITa foyphen + | fx plarntert block pen, th cipher teal 3 as . | Cc > pf modo ] Decryphon — a ate fu Gpher dent block c, th gan reat y ae d mod 0, How RSA Sccare 7 > hb ume Secure ay HUE hese techoiquer ) Brite twee altact 1) Mathemahted attack ) Timing alta +} chearea Cipher Fett attock ~The econ behind @s0's cecucityy we the fackning 0 Arg num ts hard, 4 ad thy hq chiicult ty detronne $4), Advontayes Ors odveatayes ' ~) asa ’Gn he wed tw pat, Gaootptun oll as digital Sipatune asuanphm Alot-anes MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE a Page No. Mont Expt. NO. sos Date Gt — Perla eacmphn & decmpteg auep esa ata Fn p 8, Qa, ex me ST F Slur jp p23 yeo4l N= prq - 3rit 223 {) a (-) @-t) > (3-1) (ud) C 2) Co) > 20 © ged C00) ¢) =| ho tzezdta) (2 £0 -e valeres vonges Fron ate 4) eee ged(2oa) bl es 3 ged (20,3) bf » [&= 3] d= de cnod Gla) «1 dx3 mod 20 =I det, 2,345, 6 thea AX3 mod ao 47 te deq then 43 mod 20 =} VC Signature EAMCET CODE : MRIT JNTUH CODE : S121 mod 20 = 1 se [aoa] HBS Otte Eowip hon Ce NS mod 9 C 255 Tote C > aS mod 33 c 2 oc ‘ Peenphon a | mM = ctmod 4 \ M = oc mood 33 Moe & Hepat Guptagrephy 2 gamal algo puda on adterncdre ty RIA By 4 public key Caoypry * . . | D security 4 the et ‘depends on tty clatticadt o- | fckong lye sbgen: | 4 Security A the Agemal alyo depends ow tHe det | dd Goraputvy Auicele logy mia lye pone antic dey F Agawal hoy We divodventafe Alok the Cipher fat “tere oF long Q) pla text U0MAITS: 120 Nowell san Expt. No. =e Date .... = Page No. aU hey co advontacs the Same praia tent ges att Cophen tert each -hwe cocypled. 4 ub ha 3 sheps 1) key grained >) Envy pho 3) occupied CS ) tey Genevahon 4 Select —donge prime quaber (e) rm 3 Stled a decrypbw key alo called pavate, bey (4) -) Sted Secind past of encryghen hey (a) 4 Glatate thd pot ol cocryphen, Key.) Gm ed mod p J publre Fey > C6, sp) & patiliate bey of 1 *; 2) Goceyphen 4 Seect vondow totegen @ + Glealate G = e"modp > Glalake G > (er x6") med p 4 Cpher fend > Co, nG) WC Signature EAMCET CODE,: MRIT SNTUH CODE : Si ’ % MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE a (s ‘le3 Decuphay » 4 eT > Cax(Cay) "J nod p SF ig poy ended) Gutre Gl & > chad y > @) ened > mod [& 78 pute Key > Cer eee) = C280) soos wt @ Encwyp hen — r select ‘vordom Inkeg or ary | Gl q > é"med p G= stew y Cs 46 mod | fers 7 Vet. plata tab. i Z ; ray \ ' Q = (PT x6")eod p a > (1 x 51) nod 2 2gcq2 mod If Gik ¢ ; Cher teat > 4); ben (Cs, ) becaphan + 6 (ta5f' od t} pete Cancer) )"J onde rag xx enod NI r heet ! 3 Tr encoyyis oe" fet we ees onal mn > 6X (asf! mod aru + iemedy =F By. SJ MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4, Expt. No. Date Page No......20..... oifKe = Hetlinog_key Gichonge ba” J The oilve- Hellmea Cey, Yrecarl pwtuel Wey developed by pile ob telleoa 10 (476, 2 The purpose fr thy alno ite Conable usu Wes te cuchoge a ‘o Securely that Gn pe used fy Crcyptim ok onc 3 tk yy tyed to yuk extheta the nol Povborm oe Exeryphen ] decyphen Agu. a) gy ri t % ] @) 7 -} Select tus Mumbers prime numberl ® G ee prmibre avot of OY toy bute ie 4 suppose the used A § 8 arg, fo excher] € o f . a) ure A Select a random pola eg Xn Ary ond Yq © at anod ay s) caer 68’ selech a veoclum lntesey oa Gg Grate Ye 2 ys onod WC Signature EAMCET CODE : MRIT JNTUH CODE : SISBA Ree J Both sides keep the x’ Value privake and mats the Y volue aveilable publecty to ahey tide 4 user W eoont to ——_ bes ‘ k> (1g) "® od y ] 7 wer $e’ wonl to [ee by then (e> ~C) i med 4) > Bos, Side the yerulh mul be Sane ‘ usey & aaa Generaley povalt ¥y 44) Generals x9 24 %4°s i (1. eoeale t (vy ied 9, t: (V4) “creda, i q &: we qe, d 2 F Baad | kenG rat wr — sey A maxqy (cau ( J 7 YA = Cu mod 4 Ya - of rod 4 gq C Ya= xX mod ttV7 MALLA REDDY INSTITUTE OF TECHNOLOGY & SCIENCE 4 MATS Expt. No. . ™ Dille s:.cssea alias Page NO... Mb scccscecsssemeesee user 8B xe xy ( 3 9° mod t] > ase mod lve 23 Groerote kegs k 2 (%9)"4 ance a b> (ta) enod ey K 2 3° mod g (x g? mod g tr F aod 1 k> 29 ood I) [e23/ at yey ‘A’ Ceg value ts 8 & Wen a" cr Value "a keys ove exchoryed pager VC Signature JNTUH CODE : SI EAMCET CODE : MRITSG awa peppy msTITUTE OF TECHNOLOGY & SCIENCE MRITS Expt. No. Date cm PageNO. 22 rsesseeree K koapsa.cle Algosthrp - — It wo decovaed bY oa. one et -Asymneh' c ber cryptography - — the knapsacte prberr ts an opferk galfoo preblena wed to ellustake both pProblero & Solkekon. — Gren a set of Tkerns worth Specie coefy hes & valu, the aim % to & get OS Mnch value to the lenaps oc dccodtag fo Hee cocks’ Men’ oned - Ex: coefghts » (6,8, 5 § ax) I DH Gereval Rrapsack, ce Select webg hts to ack a Sum. : TP we cont Sums 30, we Select 16,98 1S- = knapsack Ga Geocl alhemal$ve cohere coe Can create a ‘prblec “key 4 a’ private one. tek plate lexk= 10011 Pino ?® enn nn 168 tray 16 Bis ay 1415424" 40 HO HTS = 32 CT = plofo fexk * Corresponding wee ghbs "CT = 40 22- VC Signature EAMCET CODE : MRIT JNTUH CODE : SiSe key Geneneioe ack) 1) publte key Chard lenaps 5 2) privede key (eay " fend the ‘4 fet we frock the pvt bey then we fa pulltc key - . he os f1,2,4,10,20, 40h vlew - BS = wetghts are aloasys fo fooreasting © ~ § © sty frock pvt bey D = $6.2, 410,20, 40 4 — pvt key Sduld Gig eles ins ond ins” cod rm > Sum of all nos 80 Sequence - - Sum 2a lek fro 10 | Seleck So trek 8 has nO Common. factor with, ms tet(o= si] e Noco, (D8 xn) modm 4 elemertt fo D , Cixay mod no «=, 3 (2x31) mod no 2.62 (4 x21) mod NO ™ Ly (10x39 mod WO = FO (20%3) ER 0 tO (4ox 38) en eLO. {poioo = \x3)oxe> + aan aia Ox30 + 0x30 = 3i+90=12] A P park —IiMOO = yreariet+ COLO tOs (TF A 34 pat 3 1olllO = +O 414 49043040 = 2077 ) - et =fiig! 1% 204) | @ o . € Beery poo colin ee BWrmoditO =| then we get xed | Cer x2) modi mm -fvoon Seg D< Tria. 4, 10,90, 40 |, Nmod 10 = MI = joo10O ((+l0= 1) (Q0K9 217% 2 Noo CLtQALHIO= 19) (193 x71) mod 0 ay = LOMO Craux1o + 20= 35) (305 91) rod {os We mot JINTUH CODE: Si FAMCET CODE : MRIT