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The Eternity Service

The Eternity Service. Threat model Service characteristic Design highlights Overall Service structure Protocols used Servers Implementation. http://www.mail.kolej.mff.cuni.cz/~eternity/index.html. Threat model. Blunt influences - natural disasters, vandals, thieves

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The Eternity Service

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  1. The Eternity Service • Threat model • Service characteristic • Design highlights • Overall Service structure • Protocols used • Servers • Implementation http://www.mail.kolej.mff.cuni.cz/~eternity/index.html

  2. Threat model • Blunt influences - natural disasters, vandals, thieves • Amateur opponent - moderate to good knowledge, restricted resources • Professional opponent - excellent knowledge, high motivation, skilled stuff, sufficient resources • Authorities - law enforcement, global influence

  3. Service characteristics • Services: store data for agreed period, retrieve specified information • World-wide system • High reliability and availability • Anonymity • Fully distributed design • No autentization, no privacy

  4. Unlimited availability High resistance Extendibility Fully distributed design Portability and reusability In service upgrade Terseness and simplicity Separation of cryptography Good habits Design goals

  5. Flat structure High ES protection Auxiliary servers Passive behaviour Randomness, concealing Two-layered implementation Freedom principle Design guidelines

  6. Overall Service structure

  7. Server types - Eternity Server • Each ES represents an entry point • Provides data storage capacity • Assures information retrieval • Automatically discards expired data • Time synchronization • Communication with banks

  8. Server types - Mix server • Padding traffic generation • Supports erm message transfer • Represents simple and cheap way to grow the system size

  9. Server types - AC server • Assures first contact with Service • Collects certificates of servers • Provides ES access certificates and Mix certificates to all subjects

  10. Server types - EPX server • Simple easy to use interface for amateur users without the need of a top quality protection • Additional functions - secret splitting, privacy enhancement, • Local cache for quicker access to frequently requested data

  11. Access certificate

  12. Eternity Routing Mechanism

  13. ES internal structure

  14. ES data storage

  15. Platform: Posix FreeBSD Unix RSAref + Blowfish gcc Current state: ES with sw-based TCB MX, ACS Client module (alpha versions) Implementation

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