Read the following passage about When Biology Meets Digital Vulnerability and mark the letter A, B, C or D on your answer sheet to indicate...

Read the following passage about When Biology Meets Digital Vulnerability and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 23 to 30.

Recent research has unveiled an unprecedented cybersecurity threat emerging from genetic material. Scientists demonstrated that maliciously engineered deoxyribonucleic acid sequences can serve as sophisticated attack vectors against computational systems. This groundbreaking discovery challenges traditional security paradigms by exploiting the intersection between biological specimens and digital processing infrastructure. The vulnerability arises not from inherent molecular properties but from computational transformation during modern sequencing procedures, where organic matter becomes susceptible data requiring software interpretation and analysis.

The attack mechanism operates through meticulously crafted buffer-overflow exploitation targeting bioinformatics analysis tools. Researchers successfully designed genetic sequences that, when processed by sequencing equipment and converted into FASTQ file formats, trigger malicious code execution within downstream analytical software. This ingenious approach allows arbitrary commands to infiltrate host computer systems. The methodology represents a novel fusion of biological engineering and traditional hacking techniques, demonstrating how seemingly innocuous scientific samples can harbor dangerous digital payloads capable of penetrating secure environments.

However, significant constraints limit practical implementation. The malicious payload must simultaneously satisfy stringent biological requirements, including sequence length restrictions, avoidance of problematic repetitive elements, and maintenance of reliable base-reading compatibility. Additionally, the laboratory demonstration exhibited inconsistent success rates and required researchers to deliberately introduce specific vulnerabilities into open-source programs rather than exploiting naturally occurring flaws. These limitations substantially reduce immediate real-world applicability, though they do not diminish theoretical significance or potential future refinement possibilities.

The implications extend beyond this proof-of-concept, highlighting emerging challenges within the rapidly expanding bioinformatics sector. As sequencing becomes increasingly ubiquitous and genetic data processing shifts toward automated pipelines and third-party cloud services, the attack surface continues expanding. This development necessitates enhanced security protocols, rigorous code auditing practices, and comprehensive vulnerability assessments within software development. The research serves as a crucial warning about evolving cybersecurity threats in our interconnected digital-biological landscape.

https://www.wired.com/am

Question 23: Which constraint was NOT mentioned?

A. Encryption requirements

B. Sequence length restrictions

C. Avoidance of problematic repetitive elements

D. Maintenance of reliable base-reading compatibility