Altynbay Abdykassym

Dr. Altynbay Abdykassym

orcid

Research Focus & Metrics

Academic Career Length

1Year (2026-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
2 July 2026 in Symmetry
Verified
Journal Article
Open access
PDF file
LRLeila G Rzayeva
Leila G Rzayeva
AZAliya Zhetpisbayeva
Aliya Zhetpisbayeva
MZMurat Zhakenov
Murat Zhakenov
AAAltynbay Abdykassym
Altynbay Abdykassym
NAND flash-based solid state drives (SSDs) are increasingly common in computers, but they present a problem for forensic data recovery. SSDs use controller logic, flash translation layers, error correction, wear leveling, TRIM, garbage collection, and encryption to influence the recoverability of data after being written or erased, which is not the case for hard disk drives (HDDs). In this paper, we propose a machine learning-based method to determine the health of NAND SSDs and their data recoverability. The approach involves telemetry (SMART and NVMe) analysis, subsystems’ interpretation of NAND and controller health, and anomaly detection with the Isolation Forest machine learning algorithm. The task is formulated as a single-class learning problem that takes into account asymmetry, where telemetry from a healthy SSD represents the reference state and NAND degradation, controller instability, TRIM effects, and encryption-related limitations act as asymmetric deviations from this state. The presented method uses telemetry data, such as the temperature, wear level, spare blocks, media and data integrity errors, error logs, unsafe shutdowns, and uptime. This study shows that the potential for data recovery depends on the health of the NAND flash memory and controller, TRIM, encryption, and other anomalies but not necessarily any single SMART metric. The proposed approach provides explainable, data recovery-focused assessment and categorizes the SSD cases as recoverable, partially recoverable, and non-recoverable. The model was trained using a healthy SSD dataset consisting of 56,482 SATA SSD records and 82,665 NVMe SSD records, for a total of 139,147 healthy drive samples. Additionally, 20,000 synthetic training samples were generated for each SSD type to support controlled model training. The proposed platform was evaluated using 30 SSD recovery scenarios, including recovery, partial recovery, and no recovery cases. The results demonstrate that the proposed method can distinguish between healthy, warning, and abnormal SSD states and provide recovery recommendations based on NAND health, controller stability, TRIM status, and encryption limitations.

7 June 2026 in Sensors
Verified
Journal Article
Open access
PDF file
LRLeila G Rzayeva
Leila G Rzayeva
AAAigerim Alibek
Aigerim Alibek
AAAltynbay Abdykassym
Altynbay Abdykassym
MZMurat Zhakenov
Murat Zhakenov
Physical damage to smartphones creates a persistent bottleneck in mobile forensic practice: once a device can no longer be accessed through its operating system, conventional logical acquisition fails, and investigators face a choice between accepting data loss and escalating to hardware-level intervention. This paper describes an integrated forensic workflow that addresses this gap by combining In-System Programming (ISP) and Chip-Off memory extraction with an AI-assisted artifact localization and prioritization layer. The workflow was evaluated on 18 physically damaged Android smartphones for which all standard acquisition paths were unavailable. Hardware extraction produced verified binary memory images from all 18 devices. A 1D-CNN localization classifier subsequently screened those images, achieving F1-score = 0.88 and ROC-AUC = 0.94 on the synthetic test partition. Prioritization of candidate windows reduced manual review volume by 78%, cut total expert review time by 63%, and shortened the time to first relevant artifact from 42 to 14 min relative to unassisted examination (indicative estimates based on three examiner sessions; no inferential statistical test was performed). The study contributes a formalized, criteria-driven decision model for selecting between ISP and Chip-Off, which are experimentally validated thermal extraction profiles for eMMC, UFS, and PoP/RAM memory.