一种51系列单片机的解密方法
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摘要
通过控制EA的电平,先使单片机执行外部存储器中的程序,在片外存储器中执行跳转指令跳转到超出片内程序存储器地址的执行程序时,将EA改为低电平,用指令读取片内地址范围的目标码。单片机通过串口将目标码发送到上位机,从而实现解码。本解密方法也适用于具有最小模式和微处理器模式的DSP及ARM的解密。
By controlling EA level in the 51 series microcontroller,external program is run first.When external ROM jumps to the program as internal ROM address rangeis exceeded,with a jump command,EA level is changed to low.Then the code in internal ROM is read and sent to the host computer through serial port,and the decryption is realized.The method is also applicable to DSP or ARM microprocessor with minimum mode and microprocessor mode.
By controlling EA level in the 51 series microcontroller,external program is run first.When external ROM jumps to the program as internal ROM address rangeis exceeded,with a jump command,EA level is changed to low.Then the code in internal ROM is read and sent to the host computer through serial port,and the decryption is realized.The method is also applicable to DSP or ARM microprocessor with minimum mode and microprocessor mode.
引文
[1]Ninsraku W,Biolek D,Jaikla W,et al.Electronically controlled high input and low output impedance voltage mode multifunction filter with grounded capacitors[J].AEU-International Journal of Electronics and Communications,2014,68(12):1239-1246.
[2]Vellakudiyan J,Muthuchidambaranathan P,Bui F M,et al.Performance of a subcarrier intensity modulated differential phase-shift keying over generalized turbulence channel[J].AEU-International Journal of Electronics and Communications,2015,69(11):1569-1573.
[3]葛秀梅,仲伟波.基于DSP的混沌语音加密解密[J].系统实验室研究与探索,2014,10(9):137-140.
[4]刘伏文,王春华.MCS-51单片机存储器结构详解[J].电子制作,2007,32(10):54-57.
[5]Raj J J R,Rahman S M K,Anand S.8051 microcontroller to FPGA and ADC interface design for high speed parallel processing systems-Application in ultrasound scanners[J].Engineering Science and Technology an International Jouranl,2016:1416-1423.
[6]汪凯.基于ARM9和FPGA远程动态重构加解密研究[D].大连:大连理工大学,2014.
[7]孙娇.基于ARM的文件加密技术的研究与实现[D].西安:西安电子科技大学,2015.
[8]Asbullah,Muhammad Asyrat Ariffin,Muhammad Rezal Kamel.Fast decryption method for a rabin Primitive-Basedcry ptosystem[J].Proquest,2014:56-67.
[9]安志勇,杨帆,曹秒,等.一种基于STC单片机和绝对式编码器的步进电机控制方法[J].长春工业大学学报:自然科学版,2013,34(1):67-69.
[2]Vellakudiyan J,Muthuchidambaranathan P,Bui F M,et al.Performance of a subcarrier intensity modulated differential phase-shift keying over generalized turbulence channel[J].AEU-International Journal of Electronics and Communications,2015,69(11):1569-1573.
[3]葛秀梅,仲伟波.基于DSP的混沌语音加密解密[J].系统实验室研究与探索,2014,10(9):137-140.
[4]刘伏文,王春华.MCS-51单片机存储器结构详解[J].电子制作,2007,32(10):54-57.
[5]Raj J J R,Rahman S M K,Anand S.8051 microcontroller to FPGA and ADC interface design for high speed parallel processing systems-Application in ultrasound scanners[J].Engineering Science and Technology an International Jouranl,2016:1416-1423.
[6]汪凯.基于ARM9和FPGA远程动态重构加解密研究[D].大连:大连理工大学,2014.
[7]孙娇.基于ARM的文件加密技术的研究与实现[D].西安:西安电子科技大学,2015.
[8]Asbullah,Muhammad Asyrat Ariffin,Muhammad Rezal Kamel.Fast decryption method for a rabin Primitive-Basedcry ptosystem[J].Proquest,2014:56-67.
[9]安志勇,杨帆,曹秒,等.一种基于STC单片机和绝对式编码器的步进电机控制方法[J].长春工业大学学报:自然科学版,2013,34(1):67-69.