[IEEE 2019 3rd International Conference on Advanced Information and Communications Technologies (AICT) - Lviv, Ukraine (2019.7.2-2019.7.6)] 2019 3rd International Conference on Advanced Information and Communications Technologies (AICT) - Increasing the Cryptosecurity of Telecommunication Systems With Spread Spectrum by Using Pseudorandom Sequences Based on Two Ergodic Chaotic Signals