Application and Evaluation of Synthesized Sentences

Abstract

Arithmetically synthesized sentences are used for malicious purposes such as unsolicited commercial junk submission to web site. We study a problem to distinguish between natural and synthesized messages generated in Markov chains and show experimental results. Based on the difficulties of the problem, we consider a new application to CAPTCHA, a type of challenge-response test used in computing to ensure that the response is not generated by a computer.