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Secure and reliable group communication is an active area of research. The central research challenge is secure and efficient group key management. While centralized methods are often based on Diffie-Hellman key exchange. Our work investigates a novel group key agreement approach which blends key trees based on identity. It yields a secure protocol suite that is both simple and fault-tolerant. Each member of the protocol can verify others identity and easily find the invalid member, including a proper subset of group members who collude.