MonicaLamStanfordUniversity

withDanBoneh,RuvenChu,BenDodson,MichaelFischer,SudheendraHangal,BobbyGeorgescu,Te‐YuanHuang,ChanhNguyen,DebangsuSengupta,JiwonSeo,Seok‐WonSeong,SengKeatTeh,IanVo

DecentralizedSocialNetworkingProgrammableOpenMobileInternet(POMI)2020

Biggest(Last?)PersonalComputerRevoluUon

mainframe mini

workstation PC

laptop phone

10x cheaper, 10x more users

PC,TVathome,ontheroad,inhotels,ontheplane

3‐TierArchitecture

servers data

PersonalizethegenericPC,borrowthepower,display,keyboard,memory,etc

Mykey,cache,windowintomydigitalcloud:ID,personality,assets,andtheinternet

天 Tian

(Heaven)

地 Di

(Earth)

人 Ren

(Man)

Ad‐SupportedSocialNetworking

Ownership,Privacy?

EULA reserves the right to change the EULA

Convenience?Datasilos

PC

Web

dropbox Loopt

Our Personal Cloud

EconomicsofSuper‐GiantStarTopology?

Openness?

TheOmniscientMonopoly

Ad‐SupportedSocialNetworking

•  Privacy

•  Dataownership•  Datasilos

•  Costofinfrastructureforsuper‐giantstartechnologies

•  Closedproprietarysystems

DecentralizedOpenTrustworthy(DOT)SocialNetwww.dotsocialnet.org

DecentralizedacrossdifferentadministraUondomains

•  Choiceofprivacy—ownedhomeserver,paidvendor,ad‐supportedvendor

OpenAPIfordistributedapplicaUonsacrossadministraUondomains

Trustworthy:Sharingwithfine‐grainaccesscontrol

Inter-operability between MySpace & Facebook (like AT&T & Verizon)

Online social networking without reservations!

Hypotheses

Anopen,high‐levelAPIandpla>orm

makesdecentralizedapplicaAonseasytodevelop

easytodevel

$easytouse

Privacyapps

affordable

AsafehavenwithaccesscontrolPAYS

•  insitusocialnetworking•  privacy‐sensiUveapps

DecentralizaAonismorescalableandcosteffecAve

Strategy

Developinfrastructure

BasicApplicaUons

ReleaseRealApps&ExperimentResearch

ConsorUum

OpenAPI

InSituSocialNetworking

easytodevel

$ easytouse

affordable

✓ ✓ ✓

Privacyapps

Personal‐CloudButler

DecentralizedSocialNetworkingArchitecture

Big‐BrotherPortal

WebBrowser

3rdParty

WebBrowser

Encrypted & Anonymous Data, Computation, Messaging

Personal‐CloudButler

Personal‐CloudButler

Unencrypted Data &

Computation

Unencrypted Data & Computation

PrPl (Private-Public) Infrastructure

Junction Platform

PersonalCloudButlers

PersonalCloudButler:Mediatesaccesstopersonaldata

ManagesasemanUcindexpoinUngtodatahostedanywhere

MyPersonalCloud

GPS Trace Credit card history Email Phone record

Friends’ List Calendar

Personal‐CloudButler

SocialMulU‐Database

PrPlIndex

OpenIDManager

iPhone

DataStewardAPI

DataManager

SociaLite:SocialDBLanguage

MusicGPSPhotoContact

MobileclientAPI

Android

Friend’sButlers

Friend’sButlers

Friends’Butlers

imapfacebookhomeserver

SociaLite:LanguageforaSocialMulU‐Database

•  AdistributeddeclaraUvesocialdatabaselanguage

•  BasedonDatalog:programsaredeclaredasrules

•  Example:FOAF(?p):‐FRIEND(?p)FOAF(?p):‐FRIEND(?x),FOAF[?x](?p)FOAF‐CurrLocaUon(?p,?l):‐FOAF(?p),CurrLocaUon[?p](?l)

•  SupportscomposiUon,recursion•  HidesdistribuUondetails:Messaging,credenUals

•  DeclaraUve:easytoopUmize:caching,approximaUon,incrementality

easytodevel

BasicApplicaUon:Peops

•  FriendsallruntheirownButlers

•  HarvestedfriendsfromFacebook

•  Displayselectedfriendsphotos,GPSlocaUons

•  SinglequerypersonalButler•  ButlercontactsotherButlerstoreturnresults

In‐SituSocialNetworking

Former Co-workers

Stanford Friends

Research Group

Family

Old Childhood Buddies

Grade school

High school

Rock Band

Foodies

•  Extractgroupsfromemail(Jaccardsimilaritymetrics)

•  Askusersforgroupnames

•  Pre‐populatewithemailaeachments

•  Accesscontrol:OpenID

•  Suggestnewgroupmembers•  AddnewcontentsRelationship Map

easytouse

ProofofConceptonPlanetlab

Distributed SociaLite query of tagged photos over the planet with 100 nodes (20,000 photos total from Facebook)

0102030405060708090

100

0 1 2 3 4 5 6 7 8

ResultsRe

ceived

(%)

Time(s)

10Friends

20Friends

30Friends

50Friends

100Friends

JuncUon:PlamormforAdHocP2PApps

html/css/js

server-side scripting

YahooPoker

WebBrowser

WebBrowser

http://www.yahoo.com/ poker/sessionid=234

http://www.yahoo.com/ poker/sessionid=123 Activ Script

Cross- Platform Native app

generic, anonymous

XMPP

AcUvityDirector

AcUvityDirector

AcUvityDirectorAcUvityDirector

juncUon://sb/sessionID=234(byinvitaUon)

AcUvScript

Dealer Table Player

{ ad: "edu.stanford.prpl.poker”, friendlyName: "PrPl Poker”, roles: { "player": {platforms: {android: {package: "edu.stanford.prpl.poker”, url: http://prpl.stanford.edu/poker/downloads/poker.apk}}, {web: { url: "http://prpl.stanford.edu/poker/play" }}} "table”: {platforms: { web: {url: "http://prpl.stanford.edu/poker/table" }}}, "dealer”: {platforms: { java: {url: "http://prpl.stanford.edu/poker/downloads/dealer.jar" }}}}}

easytodevel

Ad‐HocGameBetweenPhones

. . .

Accept with a snap

Download software Join activity

Start Activity Invite: QR code

408‐555‐5555

ACCEPT

JoinmyBluffgame!

RollingDice(withReplacement)

1.  Commit Each picks a random r, declares gr mod p where g, p are agreed upon.

2. Give to owner If not owner, reveal r. Owner calculates value of die as (ra + rb + rc) mod 6.

3.  Reveal Owner makes his r public.

4. Verify A revealed r is only valid if gr matches gr from step 1.

a

b

c

Public

(ra + rb + rc) mod 6

ra

rb

rc

rb g

rc g

ra g

CollaboraUveYouTube

Web: < 250 lines of JS ~50 lines of Junction Phone: < 200 lines of JAVA

~60 lines of Junction

easytouse

easytodevel

Real‐LifeApplicaUonIdeas

Edu‐Games

CampusBiggest‐Loser

ShoppingSocial

easytodevel

easytouse

$

affordable

easytodevel

easytouse

easytodevel

easytouse

Privacyapps

Privacyapps

MusicSocial:Jinzora

ShareanddiscovermusicBuymusic

easytodevel

easytouse $

OnlineSocialNetworkingwithoutReservaUons

PrPl,SociaLiteJuncUon

Peops,Poker,Dice

Real‐apps:JinzoraMusic,ShoppingSocial,Edu‐Games,BiggestLoser

ResearchConsorUum

OpenAPI

EmailMining

easytodevel

$ easytouse

affordable

✓ ✓ ✓

Privacyapps

Inter-operability between MySpace & Facebook