Paper 2004/154

Controlling Spam by Secure Internet Content Selection

Amir Herzberg


Unsolicited and undesirable e-mail (spam) is a growing problem for Internet users and service providers. We present the Secure Internet Content Selection (SICS) protocol, an efficient cryptographic mechanism for spam-control, based on allocation of responsibility (liability). With SICS, e-mail is sent with a content label, and a cryptographic protocol ensures labels are authentic and penalizes falsely labeled e-mail (spam). The protocol supports trusted senders (penalized by loss of trust) and unknown senders (penalized financially). The recipient can determine the compensation amount for falsely labeled e-mail (spam)). SICS is practical, with negligible overhead, gradual adoption path, and use of existing relationships; it is also flexible and appropriate for most scenarios, including deployment by end users and/or ISPs and support for privacy and legitimate, properly labeled commercial e-mail. SICS improves on other crypto-based proposals for spam controls, and complements non-cryptographic spam controls

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Publication info
Published elsewhere. Unknown where it was published
electronic commerce and payment
Contact author(s)
herzbea @ cs biu ac il
2004-07-19: revised
2004-07-07: received
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      author = {Amir Herzberg},
      title = {Controlling Spam by  Secure Internet Content Selection},
      howpublished = {Cryptology ePrint Archive, Paper 2004/154},
      year = {2004},
      note = {\url{}},
      url = {}
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