Eternity Service

http://www.kolej.mff.cuni.cz/~eternity

Content

What is Eternity Service

Project goals

Implementation

Example

Motivation

Privacy

Integrity

Availability

Motivation

Privacy

Integrity

Availability

System requirements

search

download

upload

delete

modify

anonymity

security

History

Ross Anderson

Adam Back

Tonda Benes

we, MFF UK

Project goals

search for data

store data

anonymous communication

protocols for electronic payments

time synchronization

administrator interface

extendability

Implementation

K lie n t

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

Implementation

K lie n t

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

Implementation

K lie n t

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o

E s o E s o

Implementation

K lie n t

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o

E s o E s oA c s

B a n k

Implementation

K lie n t

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o

E s o E s oA c s

B a n k

M ixM ix

M ixM ix

M ix

Mix

onion routingtraffic paddingheader paddingdata paddingcertificates for SixTra n s la to r

R e ce iv e r

R e ce iv e r S e n de r

S e n de r

S ix

Onion routing

))))))))))

))

Six

M ix M ix M ix M ix

S ix S ix

Six

M ix M ix M ix M ix

S ix S ixS ix S ix S ix

Six

M ix M ix M ix M ix

S ix S ixS ix S ix S ix

E s o A c sA c s B a n k C lie n t

Eso

search data

store data

payments for storage

time synchronization

T C BB a n k e r

A llo ca to r

Fin de r

S y n ch ro

. . . .

S i x

Acs

Esos

Mixes

Banks S i x

A ddre s sM a n a g e r

Es oCertif

BankCertifM ix

Certif

Management of certificates of:

Bank

Accepts money from clients

management of anonymous accounts

payments to Esos (payment‘s validity checks)

S i x

Pa y m e n tM a n a g e r

pa y m e n ts

Client

upload file

search for file

download file

operations:

S i x

M a jo rdo m o

B a n k e r

$ _

Technology used

objects

threads

FreeBSD

STL

RSAEuro

Example

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Upload file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest for storageFile to store

Upload file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest for storageFile to store

Upload file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest for storageFile to store

Search for file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest to search for file

Search for file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest to search for file

Download file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest for file

Download file

K lie n t - n o te b o o k

m e c h a na n o n y m ní k o m u n is y s t é a s o v

E s o - v e n c a .k o le j

A c s - v e n c a .k o le j

M ix - m a il.k o le jM ix - n o te b o o k

M ix - d zu n g le .m s

M ix - v e n c a .k o le j

Request for Eso certificatesRequest for file

Summary

search for data

store data

anonymous communication

protocols for e-payments

time synchronization

administrator interface

extendability

Eso - TCB, Client

Eso - TCB, encryption

Mix, onion routing

Bank, Bankers

Scheduler, Synchronizer

config & log files

Six, GMessage

Eternity Service

http://www.kolej.mff.cuni.cz/~eternity