JERAJournal of Electronic Research and Application2208-35022208-3510Bio-Byword Scientific Publishing Pty. Ltd.10.26689/jera.v1i3.167Articlehttps://artdesignp.com/journal/JERA/1/3/10.26689/jera.v1i3.167SiqingYu2017132017-11-30First, we encrypted and decrypted data by RSA encryption algorithm and achieved a secure transmission of data. Aiming at the drawbacks of time consumingand  complicated program in RSA encryption algorithm, an exponentiation algorithm for solving large number of modules is proposed. Through the realization of the exponentiation algorithm, the deficiency of RSA inmodulus of large number is improved, and the processing speed is improved.