.WAFL (l@:r{}~1@>Rntry(;SI8fYsE r{}~1@>Rvurl 3http://www.u.arizona.edu/~urbancic/homework11.htmlmime text/htmlhntt"10033-6d5-3e94f20d"hvrsdata Homework #11: Cryptanalysis

Homework #11

Due 21 April 03

For tips and reminders, please refer to the Econ 452 Cryptology Page.

  1. Decipher the following line, which has been encrypted using a simple Caesar shift of an undisclosed number of places. 
    BJ HWTXX YMJ WZGNHTS FY STTS
  2. The following message has been encrypted with a two line "rail fence" transposition. What does the message say (and who said it)? 
    ALWSEESWLABEAIRIAEB
  3. Decrypt the following message encrypted with a Vigenre cipher. The code word is "SECRET." 
    OLGEQ TJCNV RGGBY RWLWR VKSFA WUVPM
ZACZX XEEPF VMGPK MIPAX JYIKM RECIX
NITPF HVCUR MWKLG NELLL GDSLL HKJEZ
JIGRF EWPQF OBFKE YMEVI XVVLW IP
  4. Find the factors of the number 19,781 (this may take a little while).


  5. The following text is enciphered using monoalphabetic substitution. What is the plaintext (and who wrote it)? 
    ZKTVS PUTWWD FUZ THXLV VKU FUZ UEXFXND TWVKXLCK NXSV SVTFQTPQ
JPBFEBJWUS XI UEXFXNBES TFQ NTFTCUNUFV SVBWW TJJWD VKU BFVUPFUV KTS
EPUTVUQ SXNU ILFQTNUFVTWWD FUZ NTPOUV XJJXPVLFBVBUS BF VKBS EXLPSU
ZU ZBWW IXELS XF UEXFXNBE JPBFEBJWUS VKTV KUWJ LS LFQUPSVTFQ
EXNJUVBVBXF TFQ HLSBFUSS SVPTVUCD BF VKUSU NTPOUVS

VXJBES VX HU BFEWLQUQ BF VKU EXLPSU BFEWLQU VKU UEXFXNBES XI
BFIXPNTVBXF CXXQS VKU VKUXPD XI VKU IBPN VKU UEXFXNBES XI
BFVUPNUQBTVBXF JPBEU EXNJUVBVBXF JPBEU QBSEPBNBFTVBXF TFQ
TLEVBXF VKUXPD ZU ZBWW TWSX SVLQD SXNU NTPOUVBFC BSSLUS TFQ SXNU
HTEOCPXLQ XF BFVUPFUV VUEKFXWXCBUS SLEK TS EXNJPUSSBXF UFEPDJVBXF
TFQ EXWWTHXPTVBAU IBWVUPBFC ZKUF PUWUATFV VX XLP LFQUPSVTFQBFC XI
VKU UEXFXNBE JPXHWUNS
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