Closed Door Security joins the Cyber Scheme

Closed Door Security, a leading provider of attack-driven cybersecurity services, today announced it has joined the Cyber Scheme, reinforcing its position as one of the UK’s leading and most widely accredited penetration testers.

The Cyber Scheme provides the highest standard of government approved examinations and is essential for technical consultants wishing to gain the NCSC CHECK status, to allow them to carry out penetration testing on public sector and critical national infrastructure networks.

As a member of the Cyber Scheme, Closed Door Security will be supporting red teaming projects, improving penetration testing standards, helping assess examinations, while also raising cybersecurity awareness and educating more organisations on threats. Closed Door Security is one of the only Scottish companies to join the scheme, which already boasts some of the UK’s most established penetration testing organisations.

“We are delighted to join the Cyber Scheme and be rubbing shoulders with some of the UK’s pen-testing giants. We are now one of the most highly-accredited cybersecurity companies in Scotland, and joining the Cyber Scheme supports us on our journey to become NSCS CHECK certified. Cybersecurity continues to shatter organisations every day, and we, as defenders, need to make it harder for criminals to exploit our Infrastructure. Penetration testing helps unearth weaknesses in systems that often go unnoticed, so with every weakness we find, and every company we educate, we firmly close a door on attackers,” said William Wright, CEO of Closed Door Security.

Closed Door Security is the only cybersecurity company based in the Outer Hebrides, and it was recently accredited by the internationally-recognised professional certification board Crest, as being a trusted and expert provider of penetration testing. The company experienced significant growth over the last year, taking on eight new employees and expanding into the United States market with Closed Door Security (US) LLC.

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T-Mobile Retailer Found Guilty of $25m Fraud Scheme

The former owner of a T-Mobile store has been found guilty of a multimillion-dollar scheme to illegally unlock and unblock mobile devices.

Argishti Khudaverdyan, 44, from Burbank, was found guilty of 14 federal charges including wire fraud, money laundering, intentionally accessing a computer without  authorisation to obtain information, access a computer to defraud and obtain value, and aggravate identity theft.

From August 2014 to June 2019, Khudaverdyan fraudulently unlocked and unblocked devices on T-Mobile, AT&T, and Sprint networks. This enabled phones to be sold on the black market, according to the Department of Justice.

Khudaverdyan also ran Top Tier Solutions, a T-Mobile store based in Eagle Rock, from January to June 2017. He continued with the fraud scheme after his contract was terminated due to suspicious behaviour.

It was enabled by phishing for T-Mobile employee log-ins or socially engineering the firm’s IT help desk to gain access to T-Mobile’s internal computer systems.

He’s also said to have worked with individuals in overseas call centres to obtain employee credentials which he then used to access systems and harvest information on more senior staff. This information could be used with the help desk to reset passwords and provide privileged access.

The accounts of over 50 different T-Mobile USA employees were compromised by Khudaverdya and his co-conspirators. The group made $25m in the process.

The unlocking services were advertised as ‘legitimate’ T-Mobile unlocks via brokers, websites such as “”, and email advertising.

Mobile devices are “locked” to a particular network until a contract is completed. Others are blocked if they are stolen or lost.

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