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    Fake Memory Cards And Usb Flash Drives Detection Techniques.

    ABSTRACT
    There is an ever increasing need for storage of soft data hence the necessity for portable detachable memory devices. The unfortunate thing is that many of the Memory Cards and Flash Drives have been hacked to bear false higher data storage capacities than their true sizes. This write up presents a method and formula to differentiate between the real and the fake ones. Samples of different authentic and fake storage device memories were taken and compared with the specified sizes in order to get their relationships. It is recommended that we go to the place of purchase with a means of reading the memory capacity in order to reduce disagreements between the seller and buyer.

    INTRODUCTION
    Losing vital documents is one of the most painful ordeal someone could go through in life. It is even worse if the data belong to a third party. Yet it is unimaginable if it belong to the organization where one works.
    I once lost very vital documents and accused someone wrongly due to fake memory card. This led to this research with the aim to serve as a guide on how to separate the good from the bad memory cards.

    OMOROGHOMWAN'S INTEGRITY TESTS PROCEDURE FOR DATA STORAGE DEVICES
    Insert your portable memory device into a computer or phone to see the usable space.

    Let the usable (writable) memory be Y.

    lt is a known fact that this value is always less than the specified size. This is due to the fact that the memory device will need some of the memory space for its internal operations (this is its read only memory - ROM).

    Let the specified Memory size be X

    IF X/1.024≈Y                -           -           -           -           -           -           -           -           1
    THEN the data storage device is fake.

    On the other hand;

    IF X/1.083≈Y                -           -           -           -           -           -           -          -           2
    THEN the data storage device is original.

    Combination of equations 1 and 2 is known as Omoroghomwan's Hard Drive Integrity Tests. 

    FIELD SAMPLES
    Table 1. below shows the relative differences in the writable memories of fake and authentic memory devices.

     Table l. Authentic and fake data storage device capacities.
    S/N
    Specified Memory, X (GB)
    Authentic Writable Memory, Ya(GB) (X/1.083)
     Authentic Memory Disk Samples (GB)
    Fake Writable Memory, Yf (GB) (X/1.024)
    1
    1
    0.923
    0.93, 0.9476
    0.98
    2
    2
    1.846
    1.8817, 1.876, 1.8
    1.95
    3
    4
    3.693
    3.6, 3.7
    3.9
    4
    8
    7.386
    7.27, 7.38
    7.8
    5
    16
    14.773
    14.83
    15.6
    6
    32
    29.547
    29.5
    31.3
    7
    64
    59.095
    59.45
    62.5

    CONCLUSION
    It is no longer news that the market is already contaminated with fake memory cards and flash drives carrying false data sizes. We are better equipped to avoid the trauma that follows such harrowing experience with the information in this write up.

    RECOMMENDATIONS
    From experience, it has been observed that memory devices of higher capacities (from 4GB) are more prone to counterfeiting. It is therefore recommended that any buyer of such should be vigilant and perform the outlined tests at the point of purchase either with a mobile phone or a computer in order to ascertain the integrity of the external memory device.


    REFERENCES

                       



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