Cryptanalysis of a computer cryptography scheme based on a filter bank

TL;DR

This paper critically analyzes a signal encryption scheme based on filter banks, revealing a significant security weakness that allows for the recovery of the secret key, thus questioning its robustness.

Contribution

It identifies a critical vulnerability in a recent filter bank-based encryption scheme, demonstrating how the secret key can be compromised.

Findings

The encryption scheme has a critical security flaw.

The secret key can be recovered due to this weakness.

The scheme's security is compromised by the identified vulnerability.

Abstract

This paper analyzes the security of a recently-proposed signal encryption scheme based on a filter bank. A very critical weakness of this new signal encryption procedure is exploited in order to successfully recover the associated secret key.