防否认 meaning in English

nonrepudiation

The network security mechanism has several essential factors : authentication , authorization , integrality , non - repudiation and confidentiality . authentication is very important and basic security service . and other security services all depend on it
网络安全机制的基本要素包括：身份认证、访问控制授权、完整性检测、防否认机制、可靠性保护，而身份认证在安全系统中的地位极其重要，是最基本的安全服务，其它的安全服务都要依赖于它。