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In this paper, a new architecture of a redundant residue number system (RRNS) quasi-chaotic (QC) encoder/decoder with an error-correcting ability is proposed for secure communication and is tailored to FPGA implementation. In the proposed architecture, binary subencoders and subdecoders are used so that a number of modulo operations required in the existing design of D. R. Frey (IEEE Trans. Circuits Syst. II, vol. 40, pp. 660-666, Oct. 2000) are replaced by a simple truncation. Furthermore, a size-reduced design of the R/B (residue-to-binary) converter with error-correcting function, which is the crucial part of the system, is proposed. As a case study, the proposed architecture is implemented in FPGA for the case of the 16-bit input and some simulation results obtained.