Practical and Secure E-Mail System (PractiSES)

  • Albert Levi
  • Mahmut Özcan
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3261)


In this paper, a practical and secure e-mail system (called “PractiSES”) that performs public key distribution and management in a unique way is proposed. PractiSES is a network of several domains. At the domain level, a designated PractiSES server, which is trusted by all users of that domain, distributes the public keys. If a user needs another user’s public key at a different domain, then inter-domain communication is carried out. PractiSES clients manage their public keys and obtain public keys of other users by using unique, secure and user-transparent protocols. PractiSES clients can exchange e-mails in encrypted and/or signed fashion. Since on-demand fetching of public keys is aimed in PractiSES, use of certificates is limited for inter-domain communications only; no certificates are used within a domain. Our simulations show that a state-of-the-art PC would be sufficient to serve as PractiSES server of a medium-size organization.


Certificate Authority Message Authentication Code Home Server Domain Server Client Module 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Albert Levi
    • 1
  • Mahmut Özcan
    • 1
  1. 1.Faculty of Engineering and Natural SciencesSabanci UniversityTuzla, IstanbulTurkey

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