The son of the man expected by many to be America's next President abandoned a laptop containing a treasure trove of top in New York New York car service-secret material, including his father's private emails and mobile phone numbers, The Mail on Sunday can reveal.

In an astonishing lapse, Hunter Biden chose to protect his MacBook Pro computer - crammed with what an IT expert last night described as a 'national security nightmare' and 'classic blackmail material' - with a single, simple password: Hunter02.

Remarkably, the 50-year-old businessman and self-confessed drug addict took the machine to a back-street IT store in Delaware in April 2019 to get it repaired - yet never returned to collect it.

Its existence was revealed by the New York Post last month, but the staggering scale and sensitivity of its contents - easily accessible to a hacker with a modicum of skill - is only revealed for the first time today.

The material, none of which was encrypted or protected by anything as basic as two-factor authentication, includes:

• Joe Biden's personal mobile number and three private email addresses as well as the names of his Secret Service agents;
• Mobile numbers for former President Bill Clinton, his wife Hillary and almost every member of former President Barack Obama's cabinet; 
• A contact database of 1,500 people including actress Gwyneth Paltrow, Coldplay singer Chris Martin, former Presidential candidate John Kerry and ex-FBI boss Louis Freeh; 
• Personal documents including Hunter's passport, driver's licence, social security card, credit cards and bank statements; 
• Details of Hunter's drug and sex problems, including $21,000 spent on one 'live cam' porn website and 'selfies' of him engaging in sex acts and smoking crack cocaine; 

While Hunter has been accused of using his family name to help with deals with Ukrainian and Chinese firms, there is nothing on the laptop to implicate Joe Biden in any wrongdoing. 

One email relating to a failed Chinese deal refers to a payment of ten per cent to 'the Big Guy', which some have suggested is the presidential hopeful.

However, Mr Biden has insisted: 'I have not taken a penny from any foreign source ever in my life.'

Last night, IT expert Chris Greany said it was 'staggering' the laptop had not been encrypted.

New laptop revelations: An IT expert last night described as a 'national security nightmare' and 'classic blackmail material' the revelation that Hunter Biden protected his laptop - which was filled with with a treasure trove of top-secret material - with a single, simple password: Hunter02.

He is pictured with what appears to be drug parephenelia in his mouth 

A contact database of 1,500 people included the numbers of Bill and Hillary Clinton, actress Gwyneth Paltrow, her ex-husband Coldplay singer Chris Martin, former Presidential candidate John Kerry and ex-FBI boss Louis Freeh 

Unpaid bill: A message from adult site Jasmin, shows Hunter's attempt to buy credit was 'declined due to insufficient funds on the credit card'.

The full letter from Jasmin.com. Hunter Biden became so addicted to illicit sexual thrills that he once spent $11,400 on a single night of debauchery at a New York strip club

'It's a data breach and dangerous to have this type of material floating around,' said the former police commander, who advised successive British Foreign Secretaries on laptop security. 

'For someone prominent, there is not only a risk of great reputational damage but also a risk of blackmail should the material fall into the wrong hands.'

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