Introducere (3) 1 Punerea problemei 1

Concluzii

• 
  Folosind XSN, utilizatorii nu sunt obligaţi să aibă cont la acelaşi furnizor de servicii sociale pentru a comunica între ei.
  
• 
  Autentificarea utilizatorilor în reţeaua XSN este sigură, deoarece majoritatea utilizatorilor va folosi servere XMPP cunoscute, precum Google sau Jabber, alternativa fiind să ruleze un server pe calculatorul personal. Asta este un avantaj faţă de Diaspora*, unde, datorită obligativităţii de a folosi un server pe calculatoarele personale, autentificarea este dificilă.
  
• 
  Sistemul funcţionează pe dispozitive mobile, pe care rulează sisteme de operare restrictive. Deoarece două aplicaţii nu pot rula în paralel şi aplicaţiile XSN nu trebuie să aibă acces la datele de autentificare ale utilizatorului, sistemul foloseşte algoritmi criptografici cu chei publice pentru a autoriza aceste aplicaţii să acţioneze în numele utilizatorului.
  
• 
  Testele efectuate au arătat că stocarea datelor direct pe dispozitivele utilizatorilor nu este fezabilă, datorită puterii mici de procesare, restricţiilor sistemelor de operare şi lărgimii de bandă limitate. În consecinţă e nevoie de stocarea datelor la furnizori specializaţi.
  

• 
  Datorită împărţirii sistemului de stocare în două componente, metadate şi date propriu-zise, furnizorul de servicii de stocare nu are acces la datele utilizatorilor, deoarece, pe de o parte, nu stochează metadatele şi, pe de altă parte, datele stocate sunt criptate şi înlocuite periodic.
  
• 
  Testele efectuate cu XSN folosind iPod-uri, iPad-uri, sisteme ce rulează Android și calculatoare, cu serverele Google și servere locale, au demonstrat că transmiterea de fișiere mici este fezabilă. Am obținut o viteză de transfer maximă pentru pachete de 128 de KB. Pentru fișierele mari este nevoie de o altă metodă de transfer, deoarece XMPP este optimizat pentru a transmite rapid mesaje scurte. Am folosit pentru aceste fișiere servere HTTP integrate.
  

La fel ca orice platformă de o asemenea complexitate, sistemul XSN va necesita o lungă perioadă de testare, prin integrarea în diverse aplicaţii.
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Lista de lucrări

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