3. Adobe

In 2012, Adobe said that it was investigating on how usernames, email addresses and encrypted passwords were stolen from a company’s database after one Egyptian hacker known as Virus_HimA poster 230 of them on Pastebin. It also revealed that about 38 million usernames and encrypted passwords of customers had been stolen in a cyber attack and it also told that the attackers had decrypted the credit-card system using adobe’s own internal systems. Many of Adobe’s application source code also had been stolen.

4. Facebook

On 27 April 2011, Facebook was hacked by a 26 year old boy named Glenn Steven Mangham. It is said that he took two weeks to hack into it. What he exactly did was he hacked into Facebook and then he stole the source code of Facebook and later he ended up in jail. When Mangham was released, he claimed that he was a white hat hacker and he did not mean any harm to Facebook’s Source code instead, he wanted to help Facebook by finding the vulnerabilities in its code.

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