1. Introduction and main concepts / Elbert E.N. Macau -- 2. Overview of digital communications / Ivan R.S. Casella, Aline de O.N. Panazio, and Murilo B. Loiola -- 3. Overview of dynamical systems and chaos / Luiz H.A. Monteiro -- 4. Basics of communications using chaos / Geza Kolumban, Tamas Krebesz, Chi K. Tse, and Francis C. M. Lau -- 5. Chaos in optical communications / Apostolos Argyris and Dimitris Syvridis -- 6. Chaotic convergence of unsupervised equalizers / Romis Attux, Everton Z. Nadalin, Joao Marcos T. Romano, Diogo C. Soriano, and Ricardo Suyama -- 7. Matched filters for chaotic signals / Jonathan N. Blakely and Ned J. Corron -- 8. Channel equalization for chaotic communications systems / Renato Candido, Magno T. M. Silva, and Marcio Eisencraft -- 9. Chaotic communications in bandlimited channels / Renato D. Fanganiello, Rodrigo T. Fontes, Marcio Eisencraft, and Luiz H.A. Monteiro -- 10. Using coupled maps to improve synchronization performance / Greta A. Abib, Marcio Eisencraft, and Antonio M. Batista -- 11. Asymptotically optimal estimators for chaotic digital communications / David Luengo and Ignacio Santamar´ıa -- 12. Blind source separation in the context of deterministic signals / Diogo C. Soriano, Ricardo Suyama, Rafael A. Ando, Romis Attux, and Leonardo T. Duarte -- 13. Denoising chaotic time series using an evolutionary state estimation approach / Diogo C. Soriano, Murilo B. Loiola, Ricardo Suyama, Marcio Eisencraft, Vanessa B. Olivatto, Joao Marcos T. Romano, and Romis Attux -- 14. Isochronal synchronization and digital chaos-based communication / Jose M.V. Grzybowski, Takashi Yoneyama, and Elbert E. N. Macau -- 15. Cryptography based on chaotic and unsynchronized elements / Romeu M. Szmoski, Fabiano A.S. Ferrari, Sandro E. de S. Pinto, Ricardo L. Viana, and Murilo S. Baptista -- 16. Robustness of chaos to multipath propagation media / Hai-Peng Ren, Murilo S. Baptista, and Celso Grebogi.