RFC 5039: SIP and Spam

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RFC 5039 SIP and Spam

• Jonathan Rosenberg
• Cullen Jennings

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Problem Areas

• Three types of spam
• Call spam
• IM Spam
• Presence Spam
• Call Spam
• Cost of a PSTN spam 250k microcents
• Cost of SIP spam 6.22 microcents
• Enormous economic incentive

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Solution Possibilities

• Content Filtering
• Black Lists
• White Lists
• Consent
• Reputation
• Address Obfuscation
• Limited Use Addresses
• Turing Tests
• Computational Puzzles
• Payments at Risk
• Legal Action
• Circles of Trust
• Centralized Providers

Strong Identity a Key For Many of these!