All Faculty Deposits

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https://hdl.handle.net/10919/70873

The "All Faculty Deposits" collection contains works deposited by faculty and appointed delegates from the Elements (EFARs) system. For help with Elements, see Frequently Asked Questions on the Provost's website. In general, items can only be deposited if the item is a scholarly article that is covered by Virginia Tech's open access policy, or the item is openly licensed or in the public domain, or the item is permitted to be posted online under the journal/publisher policy, or the depositor owns the copyright. See Right to Deposit on the VTechWorks Help page. If you have questions email us at vtechworks@vt.edu.

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Visual Accessibility Simulation: Pedagogical framework, computational methods, and implementation of a browser-based design tool
Tural, Mehmedalp (2026-10-30)
The design of interior environments influences the visual information available to people with low vision and, consequently, how they perceive, interpret, and navigate their surroundings. Understanding these relationships is important in interior design education, where students can examine how their decisions about spatial configuration, materials, and lighting may affect visual accessibility. Visual Accessibility Simulation is a browser-based educational platform developed with support from Virginia Tech's TLOS Technology-Enhanced Learning Grant. It combines explanatory resources, sample photographs, and an interactive simulator that accepts photographs and design renderings. An Empathetic Design Cycle connects image preparation and simulation with observation, documentation, discussion, and design revision. Browser access allows students to revisit these activities independently and at their own pace, alongside instructor-led studio work. This report presents the platform's pedagogical foundation, computational pipeline, and implementation. The methods include image resizing, field-of-view estimation, angular scaling, Gaussian and two-band acuity approximations, color adjustments, and condition-associated masks. The equations describe the browser's image transformations and distinguish them from the contrast-sensitivity methods that informed development. The report also identifies limits associated with image inputs, working resolution, parameter interpretation, and image-fixed representations of field loss. Examples from the website's sample library illustrate how students can connect changes in visual information to specific design questions. The platform supports reflective design inquiry rather than clinical assessment or photometric measurement. It gives students a way to examine visual information in their projects, explain why particular features matter, and justify proposed design responses
Rootstock Effects on Flower Bud Mortality in ‘Gala’ and ‘Fuji’ Apples Under Natural Spring Frost Conditions (2021–2023)
Saini, Amolpreet Kaur; Jahed, Khalil R.; Sherif, Sherif M. (Virginia Cooperative Extension, 2025-06-30)
Creative Conversations: The Un-Meeting as an Approach to Agricultural Extension Communication
Spence, Jessica R.; Kaufman, Eric K.; Seibel, Megan M.; Parrella, Jean A.; Tyler-Mackey, Crystal; Grove, Benjamin B.; Adebayo, Bolanle; Olowoyo, Olamide; Poudel, Sonika; Zhu, Stephanie; Gutter, Michael (Extension Journal Inc., 2026-10-13)
The agricultural industry increasingly faces complex challenges that require diverse stakeholder input, and traditional meeting approaches often limit engagement and perpetuate top-down dynamics that can inhibit effective problem-solving. This article explores the ``un-meeting'' format as an alternative, highlighting its ability to foster inclusive, participant-driven discussions that encourage collaborative brainstorming and actionable outcomes. Based on our experience with a statewide agriculture summit, we discuss the principles underlying un-meetings, the facilitation process, and the practical implications for Extension professionals. Recommendations include the importance of knowledgeable facilitators, a large team for effective management, and limiting session cycles to maintain focus and depth in discussions.
Respirable Aerosol Production and Reduction of Avian Influenza Transmission Risk during Chicken Processing, Bangladesh
Rimi, Nadia Ali; Saifullah, Md. Khaled; Fahad, Md. Habibullah; Hossain, Kamal; Sultana, Rebeca; Shanta, Ireen Sultana; Swayne, David E.; Mortaza, Syed Mohammad Golam; Giasuddin, Md.; Hassan, Md Zakir; LeBoa, Christopher; Biswas, Debashish; Rahman, Mahbubur; Mott, Joshua A.; Kennedy, Erin D.; Lindsley, William G. (Centers for Disease Control and Prevention, 2026-04-01)
In Bangladesh, influenza A(H5N1) viruses are endemic in poultry. Processing infected chickens can aerosolize viruses, increasing the risk for human infections. We evaluated particulate matter (PM₂.₅) mass concentration during slaughtering and defeathering methods used in live bird markets in Bangladesh to identify solutions to reduce aerosol exposure. We slaughtered 675 chickens using cones and barrels with 3 lid types and defeathered 45 chickens using a defeathering machine with 5 lid types. We interviewed 3 slaughterers to understand method preference. For slaughtering, barrels with a solid or star-cut lid reduced PM₂.₅ mass concentrations by 65%–73% compared with uncovered barrels. For defeathering, machines fully covered by a solid lid or lid with a hole and pivot door reduced PM₂.₅ mass concentrations by 50% compared with machines with no lid. Slaughterers preferred barrels covered with solid lids and defeathering machines covered with solid or hinged lids. Those methods might reduce aerosol exposure during poultry processing.
Protecting Apple Blossoms from Spring Frost: The Potential and Limitations of Cryoprotectants
Jahed, Khalil R.; Sherif, Sherif M. (Virginia Cooperative Extension, 2026-10-21)
Spring frost presents a major abiotic constraint on apple production, with shifting climates increasing the risk of early bloom exposure to sub-zero temperatures. To evaluate alternative mitigation strategies, we tested the efficacy of four commercial foliar cryoprotectants (KDL, ThermoMax, Glacier, and diKap) on 'Pink Lady' apple blossoms across three growing seasons. Biochemical analyses revealed that these applications enhance frost resilience by triggering the accumulation of protective metabolites, specifically proline and non-structural carbohydrates, which minimize cellular dehydration and membrane rupture. Field evaluations demonstrated that cumulative sub-zero exposure time is the primary driver of floral mortality, with a critical lethal threshold of approximately 30 minutes. Although freezes exceeding two hours overwhelmed all treatments, specific applications such as ThermoMax and diKap successfully preserved 5?6% of king flowers under severe stress, a margin physiologically sufficient to maintain a commercial crop load. Furthermore, these pre-bloom treatments proved safe for commercial implementation, presenting no negative effects on fruit quality and occasionally improving harvest size, sweetness, and firmness.
Protecting Peaches from Spring Frost: Delaying Bloom with JA Inhibition
Jahed, Khalil R.; Sherif, Sherif M. (Virginia Cooperative Extension, 2026-08-26)
Spring frost threatens temperate fruit production by damaging early-blooming floral tissues. Modulating bloom phenology offers a viable mitigation strategy. Because jasmonic acid (JA) promotes budbreak, we hypothesized that JA inhibitors could delay peach flowering. Over three seasons (2023-2025), two JA inhibitors, propyl gallate and antipyrine, were applied as foliar sprays to "Redhaven" and "Sunhigh" peach cultivars. Antipyrine consistently delayed full bloom by 2 to 5 days across years and cultivars. Propyl gallate induced delays of 1 to 3 days, exhibiting higher inter-annual variability dependent on early spring temperatures. Crucially, neither compound negatively impacted final fruit set at harvest. Furthermore, treatments maintained essential fruit quality attributes, including firmness and total soluble solids, while, in some cases, enhancing fruit size. These findings demonstrate that bloom delay offers a novel, resource-efficient strategy to protect deciduous orchards from late spring frost damage without compromising yield or quality.
Naphthaleneacetic Acid: A Key Tool for Reducing Preharvest Fruit Drop and Sustaining Apple Red Coloration
Tipu, Mohammad; Jahed, Khalil R.; Sherif, Sherif M. (Virginia Cooperative Extension, 2025-09-17)
Preharvest fruit drop (PFD) causes significant yield losses in ‘Honeycrisp’ apples. This study evaluated naphthaleneacetic acid (NAA), aminoethoxyvinylglycine (AVG), and their combined application for PFD management, assessing fruit retention and quality for two growing seasons. All treatments generally reduced PFD compared to controls, with AVG, commercially known as “ReTain” (Valent BioSciences LLC), often showing the greatest reduction. However, ReTain consistently impaired red fruit color development. In contrast, NAA, commercially available as “Refine” (Fine Americas, Inc.), effectively controlled PFD without negatively impacting color or firmness, and it improved fruit sweetness. These findings highlight that while both can reduce drop, Refine provides a better balance for ‘Honeycrisp’ growers by mitigating PFD while preserving or enhancing key quality attributes like color and sweetness compared to ReTain.
Evaluation of ACC and AVG Combination as a New Tool for Managing Pre-Harvest Fruit Drop and Improving Red Color in ‘Honeycrisp’ Apples
Tipu, Mohammad; Jahed, Khalil R.; Sherif, Sherif M. (Virginia Cooperative Extension, 2025-06-27)
Pre-harvest fruit drop (PFD) poses a major challenge in apple production, often leading to significant yield losses. This phenomenon is closely associated with the fruit’s ripening process, during which the phytohormone ethylene plays a critical role by promoting cell wall breakdown, ultimately leading to fruit detachment (Tipu and Sherif, 2024). At the same time, achieving adequate red peel coloration— primarily due to anthocyanin accumulation— is essential for marketability, especially in bi-colored cultivars like ‘Honeycrisp’. Ethylene also plays a central role in regulating this color development. This dual role creates a fundamental dilemma: while ethylene is essential for desirable coloration, it simultaneously increases the risk of fruit drop (Tipu et al., 2025). To combat PFD, growers often apply aminoethoxyvinylglycine (AVG), commercially known as “ReTain” (Valent BioSciences), which effectively reduces drop by inhibiting ethylene biosynthesis (Liu et al., 2022). However, the major drawback of using AVG is that by reducing ethylene, it also hinders the development of red color (Miah and Farcuh, 2024), resulting in fruit that may stay on the tree but fail to meet market color standards, creating a difficult trade-off between preventing yield loss and achieving desired quality. Addressing this challenge requires alternative strategies that can balance drop control with optimal coloration. This publication highlights the potential benefits of combining AVG with 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor of ethylene. Emerging evidence suggests that ACC may have signaling functions independent of its conversion to ethylene (Polko and Kieber, 2019). The core concept— that an AVG-ACC combination can help reduce pre-harvest fruit drop without compromising color— was detailed with physiological, biochemical, and molecular evidence in a peer-reviewed article by Tipu et al. (2025). This current report presents a grower-focused summary, distilling the key messages from that work and offering a practical solution to the ongoing challenge of balancing fruit retention and coloration.
Europeanization and De-Europeanization in the Eastern Partnership Countries
Brantly, Aaron F.; Vasilyan, Syuzanna; Seferian, Nareg; Nuriyev, Elkhan; Brantly, Nataliya D.; Tsuladze, Lia; Pântea, Serghei; Rabinovych, Maryna; Leshchyshyn, Anastasia; Hlomb, Marta; Popova, Maria (West Point Press, 2026-10-05)
Europeanization and De-Europeanization in the Eastern Partnership Countries examines how states on the EU eastern borders navigate the promises and limits of integration. Challenging linear accounts of Europeanization, it introduces de-Europeanization to show how alignment with EU norms can stall, shift, or reverse. Through comparative analyses of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine, the volume highlights how domestic politics, identity, security pressures, and economic interests shape divergent trajectories. Against Russia’s war in Ukraine and renewed enlargement debates, it assesses EU initiatives including European Neighborhood Policy and Eastern Partnership. The book shows European influence is actively negotiated rather than simply adopted.
The welfare value of forecasting accuracy in electricity markets: Evidence from ERCOT
Singh, Gurkirat; Khansa, Lara Z.; Stewart, Shamar L.; Eldardiry, Hoda (2026-11-23)
Short-term load forecasting is central to electricity market operations, yet its significance depends on how forecast errors propagate through market design. This paper examines welfare implications of forecasting accuracy in ERCOT, where scarcity pricing and ancillary service procurement translate uncertainty into consumer costs. Using zonal data from 2019 to 2024, weather-augmented generalized additive models (GAM) outperform machine learning and deep learning alternatives, achieving MAPE of 0.81 percent versus 1.45 percent for XGBoost. Embedding these gains into ERCOT’s institutional framework highlights potentially large, nonlinear welfare implications concentrated in scarcity-proximate hours, positioning forecast accuracy as a policy lever in energy-only market design.
What MAPE Cannot See: Directional Forecast Bias and Operational Risk in Electricity Markets
Singh, Gurkirat; Khansa, Lara Z.; Stewart, Shamar L.; Eldardiry, Hoda (2026-11-23)
Forecast accuracy metrics such as Mean Absolute Percentage Error are incomplete guides to operational risk when prediction errors are asymmetric. Using hourly ERCOT data from January 2019 through January 2024, we evaluate seven forecasting models. Accuracy and directional bias can diverge: the lowest-MAPE specification has MPE of 0.23% versus 0.03% for its seasonal counterpart, while tree-based MPE reaches 2.22% in August and 4.6% to 6.3% in FARWEST. We develop a four-type bias typology and a governance framework for bias-aware forecasting that generalize to settings where prediction errors carry asymmetric costs.
A Identidade Paulista nas Sinfonias para o IV Centenário de São Paulo
Sato, Eduardo (2026-09-01)
No contexto das comemorações do IV Centenário de São Paulo em 1954, o Prêmio Carlos Gomes foi criado para contemplar a melhor composição sinfônica com tema relacionado à cidade e sua história. Tal proposta representava bem as contradições das elites paulistas em torno do evento em relação às suas aspirações cosmopolitas cercadas de interesses locais. O presente artigo analisa o processo de organização do concurso bem como duas obras resultantes: a premiada Sinfonia n. 3, de Camargo Guarnieri, e a encomenda da Sinfonia n. 10, de Heitor Villa-Lobos. Ao colocar tais obras no contexto da construção de uma identidade paulista em torno do IV Centenário, pretende-se mostrar como a música sinfônica se relacionou com narrativas em torno do modernismo local e reproduziu narrativas coloniais sobre a cidade.
How to review an opinion
Reid, J. Leighton; Amaral, Valter; Miles, Rachel A.; Yin, Mengyu; Murphy, Stephen (Wiley, 2026-08)
Peer-reviewed journals publish opinions (e.g., editorials, perspectives) as well as research articles. Opinion articles can be both influential and highly cited. In 2009-2024, Restoration Ecology published 268 opinions (11% of articles), more than four out of five other ecology and conservation journals assessed, and these opinions punched above their weight, garnering 14% of all citations. The most-cited opinions include calls to action, questions about basic tenets, and proposed conceptual syntheses. Such papers raise unique challenges for editors and reviewers, who must evaluate manuscript quality without the typical standard of weighing evidence against conclusions. We posit six questions for reviewers of opinions to consider: (1) Are there unreported conflicts of interest? (2) Is the literature review complete or does it cherry pick citations to support the author’s narrative? (3) Can the reviewer build a compelling counterargument that is not sincerely represented? (4) Are citations appropriate for the statements they are purported to support? (5) Does the opinion cite empirical literature, or just other opinions? (6) Is the author misrepresenting dissenting opinion in order to build themselves up? We hope these questions help reviewers, editors, and other readers weigh support for opinion articles and opinionated statements.
Engineering next-generation nanovaccines for maternal immunization and piglet protection against porcine epidemic diarrhea virus
Ci, Qiaoqiao; Bian, Yuanzhi; Meng, Xiang-Jin; Zhang, Chenming (Elsevier, 2026-08-10)
Porcine epidemic diarrhea virus (PEDV) remains a major threat to the global swine industry, causing severe disease with high morbidity and mortality in neonatal piglets. Current vaccine strategies are challenged by the need for rapid, local protection at the intestinal mucosa in newborn piglets, and emerging PEDV variants can partially evade vaccine immunity. Nanoplatforms can help address these challenges. Across recent PEDV nanovaccine studies, a consistent theme emerges in that vaccine platform architecture and immunization route are not only delivery parameters but also the primary determinants of neutralizing activity, mucosal IgA induction, and lactogenic immunity transfer. Here in this critical review, we synthesize important design perspectives from the PEDV nanoparticle vaccine literature spanning self-assembling protein scaffolds such as ferritin and mi3, bacteriophage and virus-like particles including AP205 and HBcAg, polymeric carriers such as PLGA, chitosan, and alginate–chitosan microcapsules, and inorganic particles including silica and layered double hydroxide. All PEDV vaccine design considerations are organized into three interlocking layers including antigen choice and display, adjuvant–carrier integration, and maternal–mucosal vaccination strategy. Concurrently, mechanistic patterns are observed across models. For instance, multivalent display strengthens protective breadth, and mucoadhesive or M-cell-targeted approaches improve antigen retention and epithelial transport. Practical vaccine design principles are derived throughout this review to support translation of PEDV nanoparticle vaccines into maternal immunization strategies focused on protecting piglets against PEDV variants.
Microsoft Office Security and Possible Bypasses
Zahadat, Nima (2022-05-10)
This presentation investigates the internal security architecture of modern Microsoft Office documents and evaluates practical methods for bypassing protection controls. Because modern Office documents are XML-based compressed archives, security implementations fall broadly into two categories: content-level locking and full-file encryption. The author demonstrates that content-level locks provide minimal security and can be circumvented manually by unpacking the underlying ZIP archive and deleting restriction tags (such as removing "settings.xml" in Word or the "" line within Excel worksheet XMLs), or by opening Word documents in WordPad to strip edit permissions. In contrast, true file encryption requires cryptographic hash extraction followed by offline or cloud-based cracking using dictionary and brute-force attacks. Through comparative testing with utilities like Hashcat, commercial software like Passware, and web-based services such as OnlineHashCrack, the study examines real-world cracking efficiency, recovery timelines, and software limitations across modern Office iterations. Finally, the presentation underscores crucial operational security considerations, emphasizing software version compatibility, the unreliability of older free GUI crackers, and the privacy and data security risks inherent in uploading proprietary encrypted files to third-party online cracking platforms.
Effect of BYOD On Today’s Enterprise Security Systems
Zahadat, Nima (INCOSE, 2013-10-29)
This research presentation investigates the operational benefits, architectural vulnerabilities, and governance challenges associated with Bring Your Own Device (BYOD) adoption across modern enterprise environments. Motivated by the academic neglect of mobile security and informed by expert interviews at NIST and George Washington University, the study explores the organizational incentives driving BYOD—such as heightened employee productivity, cost reductions in hardware and training, work-from-anywhere flexibility, and service expansion in critical domains like healthcare and telemedicine. However, these advantages introduce severe technical and policy complications stemming from operating system fragmentation, differing OS versions, diverse device manufacturers, and friction with legacy architectures. The analysis reveals significant security shortcomings, notably inconsistent enforcement between desktop and mobile endpoints, data leakage across shared media and cloud sync backups, improper endpoint disposal, and minimal overall management. Evaluating commercial Mobile Device Management (MDM) platforms, the authors identify a critical control gap: across 69 standard security control objectives, only 12 are universally supported across major MDM solutions, demonstrating that software platforms alone cannot fully secure personal devices. To bridge these gaps, the presentation proposes a comprehensive security framework tailored for non-classified yet confidentiality-dependent enterprise environments. This framework balances technical controls with organizational governance, emphasizing continuous user education, rigorous compliance testing, strategic incentive structures, and sustained partnership between IT departments and end users.
A Step-to-the-Doctorate Institute: Profile of a Bridge Program
Waller, Tremayne O.; Wright, Mandy J.; Talukdar, Shahidur Rashid; Jan, Faika T.; Anshebo, Surafel; Chan, Travis; Endlaw, Shriya; Santos, Niko (CEED, College of Engineering, Virginia Tech, 2026-09)
The transition from an undergraduate degree to a graduate program represents a critical juncture in the academic pathway, particularly for students pursuing advanced degrees in science, technology, engineering, and mathematics (STEM). This transition is often characterized by systemic barriers for underrepresented groups, who face challenges such as limited access to resources, a lack of mentorship, and financial constraints. To bridge this gap, A Step to the Doctorate Institute (S2D) was founded in 2020 by Dr. Tremayne Waller and Dr. Karis Cotton. A Step-to-the-Doctorate (S2D)—an undergraduate-to-graduate bridge program—is a transdisciplinary initiative hosted by the Center for Engineering Excellence and Discovery (CEED) within the College of Engineering at Virginia Tech. S2D is an engineering-focused program designed to encourage, motivate, support, guide, and accelerate the progression of talented STEAM undergraduate students into master’s and doctoral programs. This report provides a detailed, evidence-based performance review of S2D from 2020 through 2026, examining cohort growth patterns, undergraduate pipeline diversity, and the graduate school transition successes of its alumni. Key Programmatic Achievements: S2D has achieved exceptional outcomes since its inception, establishing itself as a vital conduit for engineering graduate education. The program’s accomplishments are summarized in five core areas: ▪ Enrollment and Growth (2020–2026): The program’s annual enrollment scaled dramatically from 11 participants in 2020 to a peak of 61 participants in 2025, with a total of 223 scholars. ▪ Expanding the Scope: Initially, S2D started with only engineering major students. However, the program now has evolved into a multidisciplinary initiative with over 12% of participants from non-engineering fields such as life sciences, social sciences, and the humanities. ▪ Institutional Pipeline: S2D has recruited undergrads from 41 institutions. While Virginia Tech remains the primary pipeline (with 148 participants), the program maintains deep partnerships with historically black colleges and universities (HBCUs), minority serving institutions (MSI), and national student organizations, making the graduate pipeline more representative. ▪ Graduate School Conversion (2020–2025 Cohorts): Among the 167 participants who have completed the program, 78 (47%) have matriculated into graduate school. Of these, 54 (32%) are pursuing, or have already completed, Master’s degrees, and 24 (14%) have transitioned into PhD programs. Out of these 78 students, 41 (or 53%) have joined Virginia Tech graduate school. Notably, First-Generation participants achieved a 40% graduate school transition rate, outperforming non-first-generation peers (35%). ▪ Publications, Conferences, Research Grants: Systematic collection and analysis of data on the S2D participants and their achievements have resulted in four publications, several conference presentations, and award of five research grants to the S2D team.
Poetry, Preservation, and Custodial Clarification: Stabilizing Governance in The New River Journal
Kinnaman, Alex; Patel, Soham (2026-03-16)
Virginia Tech is home to The New River Journal, one of the oldest electronic journals dedicated to digital art and literature. Over 30 years, the journal has undergone multiple transformations in design, management, technology, and partnerships. Although the journal collaborates with external organizations for technical support, restoration, and access hosting, its website only recently migrated to infrastructure managed by the University Libraries, prompting a desire for locally-controlled preservation. Versions of the journal’s submissions are hosted by multiple parties, including knowledge bases, creator-hosted sites, and restoration environments. As a result of this distribution, knowledge base entries are incomplete, and changeover documentation is fragmented. At the same time, significant restoration of legacy works by The NEXT has reestablished access, shifting the preservation focus towards establishing a canonical inventory of the submissions and defining sustainable governance structures for long-term stewardship. This paper examines the transitional space between restoration-focused access initiatives and repository-based preservation stewardship. It proposes a stabilization model for legacy, scholar-led e-literature journals that emphasizes custodial clarification, documentation, and governance continuity within a distributed access and preservation environment. This paper aligns with the conference theme “community” and outlines how a multidisciplinary partnership can collaboratively reshape the community that supports a 30-year-old electronic literary journal through digital preservation practices grounded in risk management.
TrueCrypt vs. VeraCrypt
Zahadat, Nima (2023-06-06)
This presentation examines the technical features, operational differences, and historical context of two prominent open-source disk encryption tools: TrueCrypt and its fork, VeraCrypt. Following TrueCrypt’s abrupt discontinuation in May 2014 - spurred by developers citing security concerns and prompting widespread speculation regarding National Security Letters (NSLs) or insurmountable vulnerabilities - VeraCrypt emerged as an actively maintained community alternative. While both platforms employ robust encryption algorithms (including AES, Twofish, and Serpent) and support system partitions, external drives, and plausible deniability via hidden volumes, VeraCrypt introduces expanded hashing algorithms, an updated user interface, ongoing cross-platform compatibility, and backward compatibility with TrueCrypt volumes. Conversely, TrueCrypt faces growing obsolescence, installation issues on newer operating systems like modern macOS, and a lack of official support, despite retaining trust among legacy users who highlight its extensive audit history. Practical testing demonstrates that VeraCrypt matches TrueCrypt’s comprehensive functionality - including hiding an entire Windows operating system inside another - though it exhibits slower performance and requires supplementary software to run on macOS. Ultimately, VeraCrypt serves as the viable, actively supported successor for secure volume encryption.
Password Complexity Requirements
Zahadat, Nima (2021-06-07)
This presentation, delivered at the Techno Security and Digital Forensics Conference 2021, examines common misconceptions surrounding authentication and evaluates the real-world mechanics of password complexity versus length. The authors challenge entrenched security dogmas—such as the beliefs that arbitrary special characters inherently guarantee security, frequent password expirations enhance posture, browser-based credential storage is safe, or biometrics and two-factor authentication are impervious to compromise. By analyzing keyspace dimensions across MD5, SHA-1, and SHA-256 alongside supercomputing computational thresholds (benchmarked against Japan’s Fugaku), the study illustrates the mathematical infeasibility of brute-forcing full cryptographic hash spaces from scratch while highlighting where actual vulnerabilities lie. Rather than short, artificially complex strings, password length (aiming for 12 to 16 or more characters) is identified as the decisive defense against rainbow tables and dictionary-based offline cracking when password databases are compromised. Furthermore, the presentation outlines practical operational realities: online brute-force attempts are typically mitigated by account lockout controls, biometrics face bypass risks under unconscious or coerced conditions, and dedicated password managers remain strongly preferable to native browser credential storage. Ultimately, the study advocates for pragmatic, human-centric security policies centered on passphrases, length over arbitrary complexity, and robust physical safeguards.

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