Publication

Accountable Anonymous Service Usage in Mobile Communication Systems

Jean-Pierre Hubaux, Levente Buttyan
1999
Reports

Abstract

We introduce a model that allows of anonymous yet accountable service usage in mobile communication systems. This model is based on the introduction of a new business role, called the customer care agency, and a ticket based mechanism for service access. We motivate the introduction of customer care agencies by analyzing their role and emphasizing their advantages. We introduce the general idea of ticket based service access, present a categorization of ticket types and ticket acquisition models, and identify some possible attacks against ticket based systems. We illustrate how agencies and tickets work together by presenting a ticket based protocol between users, customer care agencies, and service providers. The protocol achieves authentication of the service provider to the user, establishment of a shared session key between the user and the service provider, and correct and undeniable charging. In addition, it provides revokable anonymity for users, which means that the identity of misbehaving users can be revealed.

Official source

https://infoscience.epfl.ch/entities/publication/d71a65ff-5af9-4c21-be84-26509b5969c1

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Jean-Pierre Hubaux, Levente Buttyan
1999
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d71a65ff-5af9-4c21-be84-26509b5969c1

About this result

Related concepts (32)

Internet service provider

An Internet service provider (ISP) is an organization that provides services for accessing, using, managing, or participating in the Internet. ISPs can be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned. Internet services typically provided by ISPs can include Internet access, Internet transit, domain name registration, web hosting, Usenet service, and colocation. An ISP typically serves as the access point or the gateway that provides a user access to everything available on the Internet.

Key-agreement protocol

In cryptography, a key-agreement protocol is a protocol whereby two or more parties can agree on a cryptographic key in such a way that both influence the outcome. If properly done, this precludes undesired third parties from forcing a key choice on the agreeing parties. Protocols that are useful in practice also do not reveal to any eavesdropping party what key has been agreed upon. Many key exchange systems have one party generate the key, and simply send that key to the other party—the other party has no influence on the key.

Shared secret

In cryptography, a shared secret is a piece of data, known only to the parties involved, in a secure communication. This usually refers to the key of a symmetric cryptosystem. The shared secret can be a password, a passphrase, a big number, or an array of randomly chosen bytes. The shared secret is either shared beforehand between the communicating parties, in which case it can also be called a pre-shared key, or it is created at the start of the communication session by using a key-agreement protocol, for instance using public-key cryptography such as Diffie–Hellman or using symmetric-key cryptography such as Kerberos.

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