00307nam a2200133Ia 45000030006000000080041000060400015000471000017000622450045000792500011001242600009001355460012001440050017001560STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKoblitz Neal  aCourse in number theory and cryptography  aSecond  c1994  aEnglish20220125165931.0