[JoGu]

Cryptology

Empirical Values for Natural Languages

a7Hzq .#5r<
kÜ\as TâÆK$
ûj(Ö2 ñw%h:
Úk{4R f~`z8
¤˜Æ+Ô „&¢Dø

Example 5: Two Independent Polyalphabetic Ciphertexts

We encrypt the poems by Heine and by Busch with different polyalphabetic substitutions and compare the resulting ciphertexts:

YSPHK CBZNS TSKIU XTYUG XCSBJ YSJUB XTQDX YFDRG XXIWB IGDOO
MMIWH HZRCW UNMPD WHJUY MPNLO NZCNP MDSSY ANPEA SLWUM VHFBS
                     |                                     
PTTZW NOVGG ZUZUE YOVJF XXRZK CVDHS ZTBIK BFMDC GMRLC CUQUO
FNEDD WHRUS EDYFC RVQRC OLLGY AMUHR TSOVM MJWJS YNIQO CXWFN
                                 |                    |    
XTQUE YIPHW AYBIW XIBMN PRAZI FIDRC TAIVB YSEJL DSKTG SWVFC
EDMBS UKUHN OTOFI DXVST XFDLX COBKN JOQIL YJWZN ZBRKD RJQXF
         |                                |                
RSBJI KIMRC LJEUE YOCOC TSZKW XLDII XYNEJ NCFOM YGQWB XCGXD
ZWXEY ANPMV STYAL IOOTS LQTNK RINDG YUNRX QJCRB VDLLX RMVNF
                   |                                       
LSSBV ZIBMF LGAII YOCNO EIAGE YIVEC GRICU AVIOO WPTWI JVUVM
CELVM FJRKQ UMMPU RJKLV ZWOCO FIXVI LVHNW UEFID SIXLZ VDWXE
                               |                           
XDMGR VGWIP HWDUE ACPUI ATLSW CFMJI MDABV UIULV MSDBX COUJU
YNMIY LOFJC XQNHX LXVPQ DRAEZ QCQZD XVFAL EHFBA BPRDD RHEYA
  |                                                        
OATKB WOAGG OAXWB ZWVXI FPSIW CVYJZ CSKIJ IPOIW YYQJV YSMOC
XXYHT NXQTM OOXLX VPCSR EMCKM PYFCN IBEIY ZYBDQ XVNBX FLDXC
            |                          |                  |
YDRWB UIMIB ZSGRB CTYGG MAZGW LOCRI HWKXU ACPRT XQCWA KTYGG
PKTNA QXEBS SIBQL EOPAN IANPJ BTLAQ XKSBI FYVXD DWKHY VEPSP
                         |                                 
MAZGC BMYUB FYIV
ASPVM COBTL ZUTD
                
Text length:414
Coincidences:12
Coincidence index:12/414 = 0.0290

Author: Klaus Pommerening, 2002-May-20; last change: 2014-Jan-23.