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author | Anton Luka Šijanec <anton@sijanec.eu> | 2023-02-27 00:15:03 +0100 |
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committer | Anton Luka Šijanec <anton@sijanec.eu> | 2023-02-27 00:15:03 +0100 |
commit | 3fed51e23753255ffc6e660aaacf926e8ac735e7 (patch) | |
tree | dd815583d778fe36343d1843d30d4fb0d61d41e1 /inf/rn/dok/lyx/uvod.lyx | |
parent | inf rn lyx (diff) | |
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Diffstat (limited to 'inf/rn/dok/lyx/uvod.lyx')
-rw-r--r-- | inf/rn/dok/lyx/uvod.lyx | 1021 |
1 files changed, 1021 insertions, 0 deletions
diff --git a/inf/rn/dok/lyx/uvod.lyx b/inf/rn/dok/lyx/uvod.lyx new file mode 100644 index 0000000..22479cf --- /dev/null +++ b/inf/rn/dok/lyx/uvod.lyx @@ -0,0 +1,1021 @@ +#LyX 2.3 created this file. For more info see http://www.lyx.org/ +\lyxformat 544 +\begin_document +\begin_header +\save_transient_properties true +\origin unavailable +\textclass scrbook +\begin_preamble +% in case somebody want to have the label "Equation" +%\renewcommand{\eqref}[1]{Equation~(\negthinspace\autoref{#1})} + +% that links to image floats jumps to the beginning +% of the float and not to its caption +\usepackage[figure]{hypcap} + +% the pages of the TOC is numbered roman +% and a pdf-bookmark for the TOC is added +\let\myTOC\tableofcontents +\renewcommand\tableofcontents{% + \frontmatter + \pdfbookmark[1]{\contentsname}{} + \myTOC + \mainmatter } + +% makes caption labels bold +% for more info about these settings, see +% https://ctan.org/tex-archive/macros/latex/contrib/koma-script/doc/scrguien.pdf +\setkomafont{captionlabel}{\bfseries} +\setcapindent{1em} + +% enables calculations +\usepackage{calc} + +% fancy page header/footer settings +% for more information see section 9 of +% ftp://www.ctan.org/pub/tex-archive/macros/latex2e/contrib/fancyhdr/fancyhdr.pdf +\renewcommand{\chaptermark}[1]{\markboth{#1}{#1}} +\renewcommand{\sectionmark}[1]{\markright{\thesection\ #1}} + +% increases the bottom float placement fraction +\renewcommand{\bottomfraction}{0.5} + +% avoids that floats are placed above its sections +\let\mySection\section\renewcommand{\section}{\suppressfloats[t]\mySection} + +% increases link area for cross-references and autoname them +% if you change the document language to e.g. French +% you must change "extrasenglish" to "extrasfrench" +% if you uncomment the following lines, you cannot use the reference version Ref+Text in LyX +%\AtBeginDocument{% +% \renewcommand{\ref}[1]{\autoref{#1}} +%} +%\def\refnamechanges{% +% \renewcommand*{\equationautorefname}[1]{} +% \renewcommand{\sectionautorefname}{sec.\negthinspace} +% \renewcommand{\subsectionautorefname}{sec.\negthinspace} +% \renewcommand{\subsubsectionautorefname}{sec.\negthinspace} +% \renewcommand{\figureautorefname}{Fig.\negthinspace} +% \renewcommand{\tableautorefname}{Tab.\negthinspace} +%} +%\@ifpackageloaded{babel}{\addto\extrasenglish{\refnamechanges}}{\refnamechanges} +\end_preamble +\options intoc,bibliography=totoc,index=totoc,BCOR10mm,captions=tableheading,titlepage +\use_default_options true +\master /usr/share/lyx/examples/thesis/thesis.lyx +\begin_modules +customHeadersFooters +\end_modules +\maintain_unincluded_children false +\language slovene +\language_package default +\inputencoding utf8 +\fontencoding global +\font_roman "lmodern" "default" +\font_sans "lmss" "default" +\font_typewriter "lmtt" "default" +\font_math "auto" "auto" +\font_default_family default +\use_non_tex_fonts false +\font_sc false +\font_osf false +\font_sf_scale 100 100 +\font_tt_scale 100 100 +\use_microtype false +\use_dash_ligatures false +\graphics default +\default_output_format default +\output_sync 0 +\bibtex_command bibtex +\index_command default +\float_placement h +\paperfontsize 12 +\spacing single +\use_hyperref true +\pdf_title "Your title" +\pdf_author "Your name" +\pdf_bookmarks true +\pdf_bookmarksnumbered true +\pdf_bookmarksopen true +\pdf_bookmarksopenlevel 1 +\pdf_breaklinks false +\pdf_pdfborder true +\pdf_colorlinks false +\pdf_backref false +\pdf_pdfusetitle false +\pdf_quoted_options "pdfpagelayout=OneColumn, pdfnewwindow=true, pdfstartview=XYZ, plainpages=false" +\papersize a4paper +\use_geometry false +\use_package amsmath 2 +\use_package amssymb 2 +\use_package cancel 1 +\use_package esint 1 +\use_package mathdots 1 +\use_package mathtools 1 +\use_package mhchem 1 +\use_package stackrel 1 +\use_package stmaryrd 1 +\use_package undertilde 1 +\cite_engine basic +\cite_engine_type default +\biblio_style plain +\use_bibtopic false +\use_indices false +\paperorientation portrait +\suppress_date false +\justification true +\use_refstyle 0 +\use_minted 0 +\branch Standalone +\selected 1 +\filename_suffix 0 +\color #ff0000 +\end_branch +\index Index +\shortcut idx +\color #008000 +\end_index +\secnumdepth 3 +\tocdepth 2 +\paragraph_separation skip +\defskip medskip +\is_math_indent 1 +\math_indentation default +\math_numbering_side default +\quotes_style german +\dynamic_quotes 0 +\papercolumns 1 +\papersides 2 +\paperpagestyle fancy +\tracking_changes false +\output_changes false +\html_math_output 0 +\html_css_as_file 0 +\html_be_strict false +\end_header + +\begin_body + +\begin_layout Left Header +\begin_inset Argument 1 +status open + +\begin_layout Plain Layout +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +chaptername +\end_layout + +\end_inset + + +\begin_inset space ~ +\end_inset + + +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +thechapter +\end_layout + +\end_inset + + +\end_layout + +\end_inset + + +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +rightmark +\end_layout + +\end_inset + + +\begin_inset Note Note +status collapsed + +\begin_layout Plain Layout +Enable page headers and add the chapter to the header line. +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Right Header +\begin_inset Argument 1 +status open + +\begin_layout Plain Layout +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +leftmark +\end_layout + +\end_inset + + +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Left Footer +\begin_inset Argument 1 +status open + +\begin_layout Plain Layout +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +thepage +\end_layout + +\end_inset + + +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Center Footer + +\end_layout + +\begin_layout Right Footer +\begin_inset Argument 1 +status open + +\begin_layout Plain Layout + +\end_layout + +\end_inset + + +\begin_inset ERT +status collapsed + +\begin_layout Plain Layout + + +\backslash +thepage +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Chapter +Uvod +\end_layout + +\begin_layout Section +Peer-to-peer omrežja za distribucijo datotek +\end_layout + +\begin_layout Standard +Izmenjava in distribucija velikih datotek na internetnih omrežjih veliki + količini odjemalcev predstavlja težavo, saj je v osnovi TCP/IP sklada protokolo +v isto datoteko poslati tolikokrat, kolikor odjemalcev imamo. + Distributorji večjih količin podatkov na internetu se morajo zaradi centralizir +anega modela infrastrukture strežnikov, kjer centraliziran strežnik posreduje + identične informacije večkrat večim odjemalcem, ki med seboj ne komunicirajo, + posluževati dragih metod kolokacije strežnikov. +\end_layout + +\begin_layout Standard +Koncept P2P (angl. + peer-to-peer) predstavlja alternativen način distribucije identičnih datotek + večim odjemalcem. + Namesto enega strežnika, ki iste podatke pošlje vsakič znova odjemalcem, + v omrežjih P2P za distribucijo datotek ni razlike med strežnikom in odjemalcem. + Vsak odjemalec podatke tako prejema kot tudi pošilja. + Takoj ko odjemalec prejme vsebino od drugega odjemalca, jo bo tudi sam + začel deliti naprej drugim odjemalcem, ki to vsebino tudi sami iščejo. + S svojim sodelovanjem v distribuciji vsebine razbremeni ostale odjemalce, + ki datoteke distribuirajo prosilcem, saj so P2P omrežja izdelana tako, + da lahko odjemalci vsebino prejemajo od večih odjemalcev hkrati. + Čim več odjemalcev razpolaga z neko vsebino, tem manj podatkov mora poslati + posamezen odjemalec novemu odjemalcu, ki si to vsebino želi prenesti. + Tako se zmanjša obremenitev omrežja, saj je količina prenesenih podatkov + po omrežni topologiji čedalje bolj razporejena. +\end_layout + +\begin_layout Standard +Sistem pa ni povsem brezhiben, saj je še vedno treba na nek zunanji način + med seboj povezati odjemalce, ki so zainteresirani za določeno temo (recimo + za določeno datoteko). + Druga očitna slabost pa je, da je možno ugotoviti, kdo prenaša kakšno vsebino, + ker odjemalci (neke datoteke) vedo za internetne naslove drugih odjemalcev, + saj lahko le tako neposredno čim bolj učinkovito komunicirajo z njimi. +\end_layout + +\begin_layout Standard +Koncept P2P ni namenjen le distribuciji datotek, temveč se zaradi svoje + prednosti razbremenitve strežnikov dandanes vse pogosteje uporablja, na + primer pri spletnih videokonferencah, anonimizacijskih omrežjih, kriptovalutah, + internetu stvari in drugje. +\end_layout + +\begin_layout Section +Protokol BitTorrent +\end_layout + +\begin_layout Standard +Za distribucijo datotek morajo odjemalci za medsebojno komunikacijo uporabljati + standardiziran protokol za signalizacijo prenosov. + Eden izmed najbolj razvitih (citiraj) in uporabljenih protokolov je BitTorrent. + Prvo implementacijo je idejni avtor protokola izdelal leta 2001(citiraj), + od leta 2008 pa lahko z objavo dodatkov pri razvoju skupaj sodeluje širša + javnost(citiraj). + Zaradi razširljive zasnove je protokol namreč moč dopolnjevati in mu s + tem dodajati nove funkcije. + Sprva je na primer protokol omogočal le pospešeno distribucijo datotek + iz enega strežnika k več odjemalcem (citiraj), saj so si odjemalci koščke + vsebine delili med seboj, vendar je še vedno temeljil na centralnih strežnikih, + ki stalno gostijo datoteke in koordinirajo skupek odjemalcev, danes pa + omogoča (citiraj) od centraliziranih strežnikov povsem neodvisno delovanje, + prav z uporabo protokola DHT. +\end_layout + +\begin_layout Standard +Za nadaljnji opis je potrebno poznavanje pojmov, ki jih uvede BitTorrent: +\end_layout + +\begin_layout Standard +\begin_inset Float table +wide false +sideways false +status open + +\begin_layout Plain Layout +\noindent +\align center +\begin_inset Tabular +<lyxtabular version="3" rows="8" columns="3"> +<features tabularvalignment="middle" tabularwidth="100text%"> +<column alignment="center" valignment="top" width="20text%"> +<column alignment="center" valignment="top" width="11text%"> +<column alignment="center" valignment="top" width="60text%"> +<row> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Pojem +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Izvirno angleško ime +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Razlaga +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +soležnik (citraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +peer +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +odjemni program na računalniku ali računalnik, za povezavo nanj potrebujemo + njegov IP naslov in vrata +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +roj (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +swarm +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +več soležnikov, ki prenašajo datoteke torrenta +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +torrent/metainfo (ni ustaljenega prevoda, neposredni prevod bi bil +\shape italic +hudournik +\shape default +) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +torrent ali metainfo +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +strukturirana datoteka v obliki bencoding, ki vsebuje metapodatke o datotekah, + torej imena datotek, njihove velikosti, razporeditev po imenikih, zgoščene + vrednosti za preverjanje istovetnosti ob prenosu in drugo +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +sledilnik (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +tracker +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +centraliziran strežnik, ki hrani podatke o tem, kateri soležniki so v roju + določenega torrenta +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +košček (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +piece +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +del vsebine torrenta konstantne dolžine +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +infohash (ni ustaljenega prevoda) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +infohash +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +zgoščena vrednost serializiranih podatkov pod ključem info v torrentu, ki + unikatno opišejo ključne metapodatke o torrentu +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +announce (ni ustaljenega prevoda, neposredni prevod bi bil +\shape italic +obvestilo +\shape default +) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +announce ali ~ment +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +obvestilo ali obveščanje o obstoju soležnika za torrent, ki ga pošlje soležnik + bodisi sledilniku bodisi v DHT in s tem zagotovi, da bodo ostali soležniki + izvedeli za njegov obstoj in se potencialno povezali nanj +\end_layout + +\end_inset +</cell> +</row> +</lyxtabular> + +\end_inset + + +\begin_inset Caption Standard + +\begin_layout Plain Layout +Nepopoln seznam pojmov BitTorrenta, potrebnih za razumevanje naloge +\end_layout + +\end_inset + + +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Standard +BitTorrent protokol ne omogoča iskanja po datotekah, ki se prenašajo po + omrežju. + Za prenos datoteke je najprej treba poznati metapodatke o obstoječih datotekah. + Ti metapodatki so shranjeni v t. + i. + obliki torrent, strojno berljivi datoteki, serializirani s preprosto serializac +ijsko metodo bencoding. + Vsebujejo imena in poti datotek ter njihove zgoščene vrednosti, ime torrenta, + lastnosti prenosa: velikost koščka, ime, zasebnost (angl. + private torrent). +\end_layout + +\begin_layout Standard +V nalogi se ne osredotočam na klasičen način iskanja soležnikov s sledilniki, + prav tako ne govorim o prenosu datotek od soležnikov ter o signalizaciji + za omejevanje pasovne širine prenosa (choking), temveč samo o prenosu metapodat +kov. +\end_layout + +\begin_layout Section +Protokol BitTorrent DHT +\end_layout + +\begin_layout Standard +DHT je kot koncept definiran zelo splošno, za BitTorrent je uporabljen sistem + DHT, imenovan Kademila. + Uporablja se odpravo odvisnosti od sledilnika, saj lahko v njej hranimo + seznam soležnikov v roju. +\end_layout + +\begin_layout Standard +\begin_inset Float table +wide false +sideways false +status open + +\begin_layout Plain Layout +\noindent +\align center +\begin_inset Tabular +<lyxtabular version="3" rows="6" columns="3"> +<features tabularvalignment="middle" tabularwidth="100text%"> +<column alignment="center" valignment="top" width="20text%"> +<column alignment="center" valignment="top" width="10text%"> +<column alignment="center" valignment="top" width="60text%"> +<row> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Pojem +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Izvirno angleško ime +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +Razlaga +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +vozlišče (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +node +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +odjemni program na računalniku ali računalnik +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +usmerjevalna tabela (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +routing table +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +seznam vozlišč, ki ga hrani posamezno vozlišče +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +ID vozlišča +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +node ID +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +160 bitov dolga naključno generirana številka, ki pripada vsakemu vozlišču +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +merilo za razdaljo +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +distance metric +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +funkcija (XOR), ki izrazi konceptualno razdaljo kot 160 bitov dolgo številko + med dvema vozliščema +\end_layout + +\end_inset +</cell> +</row> +<row> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +koš (citiraj) +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +bucket +\end_layout + +\end_inset +</cell> +<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none"> +\begin_inset Text + +\begin_layout Plain Layout +na posamezno vozlišče relativna množica drugih vozlišč, ki so si glede na + merilo za razdaljo blizu, shranjena v usmerjevalni tabeli +\end_layout + +\end_inset +</cell> +</row> +</lyxtabular> + +\end_inset + + +\begin_inset Caption Standard + +\begin_layout Plain Layout +Nepopoln seznam pojmov Kademile, potrebnih za razumevanje naloge. + Za noben pojem nisem našel ustaljenih slovenskih prevodov.(citiraj) +\end_layout + +\end_inset + + +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Standard +Kademilo, kot se uporablja v BitTorrentu, si lahko za začetek predstavljamo + kot abstraktno razpršilno tabelo, ki je shranjena porazdeljeno na velikem + omrežju vozlišč/računalnikov in podpira naslednji operaciji (citiraj): +\end_layout + +\begin_layout Paragraph +Pridobi soležnike +\end_layout + +\begin_layout Standard +Vrne seznam soležnikov (IP naslov in vrata) za torrent, opisan z njegovim + infohashom. +\end_layout + +\begin_layout Paragraph +Announce +\end_layout + +\begin_layout Standard +V seznam soležnikov za torrent, opisan z njegovim infohashom, vstavi IP + naslov in vrata pošiljatelja zahteve. +\end_layout + +\begin_layout Standard +Cilj raziskovalne naloge je s sodelovanjem v DHT omrežju pridobiti čim več + obstoječih ključev v razpršilni tabeli, da lahko z operacijo +\series bold +pridobi soležnike +\series default + pridobimo sezname soležnikov, na katere se lahko povežemo in od njih prenesemo + metapodatke o torrentih, da lahko te podatke kot izvleček celotnega omrežja + kasneje uporabimo za analiziranje. +\end_layout + +\begin_layout Section +Obstoječe implementacije +\end_layout + +\begin_layout Standard +Da je to pridobivanje mogoče, se ve že od vpeljave protokola DHT, saj obstaja + mnogo implementacij koncepta pridobivanja podatkov iz omrežja DHT za prenos + metapodatkov torrentov: +\end_layout + +\begin_layout Itemize +Spletna stran in istoimenski program +\series bold +Btdigg +\series default + (citiraj) +\end_layout + +\begin_layout Itemize +Spletna stran v kitajščini pod več imeni: +\series bold +clzhizhu +\series default +.com, cilizhizhu, clzz1020.buzz, clzz1025.buzz, clzz1026.buzz idr. + Za obstoj te strani sem ugotovil med implementacijo programa, saj je njeno + iskanje invazivno in moti obstoječe delovanje DHT. +\end_layout + +\begin_layout Itemize +Spletna stran +\series bold +I know what you download +\series default + (citiraj), ki hrani najdene podatke o rojih in s tem razkrije identiteto + prenašalcev. +\end_layout + +\begin_layout Standard +\begin_inset Branch Standalone +inverted 0 +status open + +\begin_layout Standard +\begin_inset Note Note +status open + +\begin_layout Plain Layout +The contents of this branch is only output if this chapter is processed + on its own, i. +\begin_inset space \thinspace{} +\end_inset + +e., not from the master. + This allows you to have a bibliography and a nomenclature if you only want + to output this chapter. +\end_layout + +\end_inset + + +\end_layout + +\begin_layout Standard +\begin_inset CommandInset include +LatexCommand include +filename "Bibliography.lyx" + +\end_inset + + +\end_layout + +\end_inset + + +\end_layout + +\end_body +\end_document |