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#1 2018-10-10 08:14:43

bears123
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HONG KONG Lavonte David Jersey , Sept. 28 (Xinhua) -- A major loophole in mobile payment systems was discovered by researchers from the Chinese University of Hong Kong (CUHK), which made the finding public on Thursday.


The discovery was made by the System Security Lab led by Professor Kehuan Zhang from the Department of Computer Science and Engineering at CUHK, which has analyzed various major mobile payment systems for their security vulnerabilities.


In mobile payment transactions, the key to communications between the mobile payer and payee is a payment token that is issued by the payment service provider to verify the payment.


Some of the most widely adopted forms of transmitting these tokens include Near-Field Communication (NFC), Quick Response Code (QR code) scans and Magnetic Secure Transmission (MST).


According to Zhang, whose team has spent two years in conducting an in-depth study into these payment systems, apart from NFC Doug Martin Jersey , the remaining formats support one-way communications only.


In other words, if the transaction fails, the payee's device is unable to notify the payer and cancel or reclaim the token already issued, a loophole that an active adversary can exploit.


In regard to QR Code scanning, a popular format of token verification, the study has revealed that a malicious device is able to sniff the token from the payee's screen from afar and spend it on a different transaction.


As for MST function uniquely used by Samsung Pay, payers are required to place their handsets within a 7.5 cm distance of the payees' POS (Point of sale) for identification.


But after a series of tests Gerald McCoy Jersey , the team discovered that the magnetic signals can be picked up from 2 meters away. A rogue in a supermarket queue can seize the opportunity to attack and steal the token.


The team has notified relevant third party payment platforms and Zhang reminded mobile payment users to stay alert and avoid downloading mobile apps from unknown sources.


The result of the study has also been released at USENIX Security '17, a prestigious annual academic conference on internet security, held last month in Vancouver, Canada.


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WASHINGTON, April 23 (Xinhua) -- Electrical pulses delivered from cochlear implants, which have been commercially available since the 1970s, can be used to regrow auditory nerves in people with severe hearing loss, Australian researchers said Wednesday.


The research DeSean Jackson Jersey , published in the U.S. journal Science Translational Medicine, may also herald a possible new way of treating a range of neurological disorders, including Parkinson's disease, and psychiatric conditions such as depression through this novel way of delivering gene therapy.


"People with cochlear implants do well with understanding speech, but their perception of pitch can be poor, so they often miss out on the joy of music," senior author Gary Housley Mike Evans Jersey , who is professor of the University of New South Wales, said in a statement.


"Ultimately, we hope that after further research, people who depend on cochlear implant devices will be able to enjoy a broader dynamic and tonal range of sound, which is particularly important for our sense of the auditory world around us and for music appreciation," Housley said.


The five-year research focused on regenerating surviving nerves after age-related or environmental hearing loss, using existing cochlear technology Jameis Winston Jersey , which can partially restore hearing by providing direct electrical stimulation to auditory nerves in the inner ear. However, current cochlear implants cannot restore hearing to normal, and the electrode design has changed little in decades.


According to the researchers, auditory nerve endings can regenerate if neurotrophins, a naturally occurring family of proteins crucial for the development, function and survival of neurons, are delivered to the auditory portion of the inner ear known as the cochlea.


But until now Mike Alstott Jersey , research has stalled because safe, localized delivery of the neurotrophins can't be achieved using drug delivery, nor by viral-based gene therapy.


In the new study involving completely deaf guinea pigs, the researchers developed a way of using electrical pulses delivered from the cochlear implant to deliver a solution of DNA containing the brain-derived neurotrophic factor (BDNF) gene to the cells close to the array of implanted electrodes.


Within a few hours, cells in the cochlea took up the DNA and started to produce neurotrophins, they said.


The researchers tested the animals' hearing using the auditory brainstem response test, a common technique used to measure hearing in newborn babies.


They found that animals that were once completely deaf had their hearing restored to almost normal levels.


"No-one had tried to use the cochlear implant itself for gene therapy Custom Tampa Bay Buccaneers Jerseys ," said Housley. "With our technique, the cochlear implant can be very effective for this."


First author Jeremy Pinyon of the university said it's possible that in the future this gene delivery would only add a few minutes to the implant procedure.


Integration of this technology into other "bionic" devices such as electrode arrays used in deep brain stimulation for treating diseases like depression could also afford opportunities for safe, directed gene therapy of complex neurological disorders, the researchers said.


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2018-10-10 08:14:43

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