sip-authentication-security

Installation
SKILL.md

SIP Authentication and Security

Master SIP authentication mechanisms (HTTP Digest), TLS encryption, SIPS, and security best practices for building secure VoIP applications.

HTTP Digest Authentication

Challenge-Response Flow

Client                                    Server
  |                                         |
  | REGISTER (no credentials)               |
  |---------------------------------------->|
  |                                         |
  |    401 Unauthorized                     |
  |    WWW-Authenticate: Digest             |
  |      realm="atlanta.com"                |
  |      nonce="dcd98b7102dd..."            |
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First Seen
Jan 22, 2026