TheCodeBreakers
spuns(-pa), who lived in the 1300s. The Nsibidi secret society of Nigeria
keeps its pictographic script from Europeans as much as possible
because it is used chiefly to express love in rather direct imagery, and
samples appear to be at least as pornographic as they are cryptographic.
The cryptography of Thailand developed under Indian influence. An
embryonic study of the subject even appears in a grammatical work
entitled Poranavakya by Hluang Prasot Aksaraniti (Phe). One system,
called "the erring Siamese," substitutes one delicate Siamese letter for
another. In an-
other system, consonants are divided into seven groups of five letters;
a letter is indicated by writing the Siamese number of its group and
placing vertical dots under it equal in number to the letter's place in its
group. A system called "the hermit metamorphosing letters" writes the
text backwards.
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annaabi.ee 
