The key protocol scheme based on generalized inverse was proposed by Dawson in 1997, The scheme is modified by Wang Y J 1999. Some further modification is made to secure the protocol from basic attacks.

• 广义逆矩阵的密钥协定方案于 1997年由Dawson提出 ,1999年王永传等人修改了此方案 ,本文进一步改进这类密钥协定方案 ,这样避免了基本攻击