题目3单选题
用户A利用公开密码算法向用户B发送消息M(假定M是较长的无结构的随机二进制字节串),公开密码函数为E,散列函数为H,A的公钥为<img src="https://tihai-oss-cloud.itihey.com/img/6fe9be89963f3f27037a845b38316993.webp">,私钥为<img src="https://tihai-oss-cloud.itihey.com/img/fe59bdc7c4d866b2fcca5e50228e33a5.webp">,B的公钥为<img src="https://tihai-oss-cloud.itihey.com/img/c132de7396747596dcad0aaf4e6593a3.webp">,私钥为<img src="https://tihai-oss-cloud.itihey.com/img/6a811f840fcc0548a183b9c187d2ad05.webp">,提供机密性、不可否认性、完整性的最佳方案是( )A. <img src="https://tihai-oss-cloud.itihey.com/img/f12ed69189157f4a80eb33becd09f168.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/9ee5a47bd54b3ce291bac85a6511b0de.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/92c1eafa05c6bc07fb3ccc76a1154bdb.webp"><img src="https://tihai-oss-cloud.itihey.com/img/c153fb94f9c1a10a0d5cc667dbafa3a8.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/4bcd5ae9863ed1d49b370aada92f4682.webp">