Improved Scheme of One-time-password Authentication

After analysing one one-time-password authentication scheme proposed by Zhang Hong and Chen Zhigang,some insecurities such as data storage and can not resist denial of service attacks are pointed out.The scheme is improved with simplicity of one-time-passwords and cryptography technology and the USB Key media.A more secure authentication scheme is produced and the safety analysis is given.Results show that the sheme is easy to operate,secret and safety,and has less system consumption.