Dual-Targeted Textfooler Attack on Text Classification Systems

Cipher text only attack on speech time scrambling systems using correction of audio spectrogram

Recently permutation multimedia ciphers were broken in a chosen-plaintext scenario. That attack models a very resourceful adversary which may not always be the case. To show insecurity of these ciphers, we present a cipher-text only attack on speech permutation ciphers. We show inherent redundancies of speech can pave the path for a successful cipher-text only attack. To that end, regularities ...

Birthday Attack on Dual EWCDM

In CRYPTO 2017, Mennink and Neves showed almost nbit security for a dual version of EWCDM. In this paper we describe a birthday attack on this construction which violates their claim.

A Simple Generic Attack on Text Captchas

Text-based Captchas have been widely deployed across the Internet to defend against undesirable or malicious bot programs. Many attacks have been proposed; these fine prior art advanced the scientific understanding of Captcha robustness, but most of them have a limited applicability. In this paper, we report a simple, low-cost but powerful attack that effectively breaks a wide range of text Cap...

A Novel Field Learning Algorithm for Dual Imbalance Text Classification

Fish-net algorithm is a novel field learning algorithm which derives classification rules by looking at the range of values of each attribute instead of the individual point values. In this paper, we present a Feature Selection Fish-net learning algorithm to solve the Dual Imbalance problem on text classification. Dual imbalance includes the instance imbalance and feature imbalance. The instanc...

Text classification for spoken dialogue systems