[1] Como ejemplo, vea el sistema de sustitución con homófonos utilizado en la primera Cifra General de Felipe II de 1556. <<
[2] “340 Cipher” sinleb.com. <<
[3] “Z 408 Zodiac Killer Cipher” zodiologists.com. <<
[4] ”Zodiac cipher” wikipedia.com. <<
[5] “Efficient attacks on homophonic substitution ciphers” Amrapali Dhavare. Proyecto de Master, San José State University, 2011. <<
[6] “Heuristic Search Cryptanalysis of the Zodiac 340 Cipher” Pallavi Kanagalakatte Basavaraju. Proyecto de Master, San José State University, 2009. <<
[7] “Analysis of the Zodiac 340-cipher” Thang Dao. Tesis, San José State University, 2008. <<
[8] “Tewksbury Native: I’ve Cracked The Code Of The Zodiac Killer” Tewksbury Patch, 21/07/2011. <<
[9] “Meet the man who claims he has CRACKED the code of the Zodiac Killer (and his identity)” Daily Mail, 22/07/2011. <<
[10] “Zodiac Cipher cracked” Bruce Schneier. CryptoGram, 5/08/2011. <<
