Cuicui Zhao

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In various versions of WINRAR, the file security is mainly protected by user authentication and files encryption. Password based key derivation function (PBKDF) is the core of the WINRAR security mechanism. In this paper, the security of PBKDF algorithm and the encrypted file in WINRAR are analyzed by the GamePlaying approach. We show the upper boundary of(More)
In MIMO systems, spatial multiplexing is a powerful technique for increasing channel capacity by transmitting multiple data streams in the same channel simultaneously. Moreover, additional performance can be extracted in the presence of channel state information (CSI) at the transmitter. However, channel estimation error usually exists in practical systems(More)
The WiMAX technology based on IEEE 802.16 is expected to support multimedia services with guaranteed quality of service (QoS). In this paper, a scheduler structure with priority classes is designed for IEEE 802.16 wireless networks, and a channel quality dependent rate-limited (CD-RL) algorithm is proposed. CD-RL provides promised data rates while taking(More)
In Microsoft Office, the file security is mainly protected by user authentication and files encryption. The cryptographic keys are usually derived from a password. Thus, password based key derivation function (PBKDF) is the core of the security scheme. However, the security of the PBKDF of Office is not yet ensured. In this paper, the PBKDF algorithm is(More)
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