Here I use the maximal overlap discrete wavelet transform (MODWT) to extract R-peaks from the ECG waveform. This algorithm is also efficient in the running time, because the complexity is linear w.r.t. the number of characters in the Plaintext. The wavelet transform can help convert the signal into a form that makes it much easier for our peak finder function.
The experiments and analysis show that the algorithm is a good cryptographic algorithm based on the correlation between Plaintext and Ciphertext, encryption quality, the decryption key space, cryptanalysis (Ciphertext-only attack) and security analysis (entropy analysis, key sensitivity, Plaintext sensitivity). The cryptographic process involves only maximization and addition operations as main operations. This guarantees that the decryption key is very difficult to obtain using the brute-force method. The decryption key consists of the encryption key and a sequence generated by the binary encoding of detail components. The encryption key is chosen such that multiplication of the number of channels in all levels is greater than or equal to the number of characters in the Plaintext. The encryption key contains the number of channels in all levels. Encryption and decryption algorithms are constructed based on the analysis and synthesis process of Type IVa MP-Wavelets, respectively. In this paper, we propose a cryptographic algorithm based on Type IVa max-plus wavelet transforms (MP-Wavelets). O2MAD: A Scilab Toolbox for Output Only Modal Analysis and Diagnosis, 67 (English). Until now, many varieties of cryptographic algorithms are available in the literature. Cryptography has a role to secure an important information.
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