Hacking incidents are not unheard of, especially in the Bitcoin sector. The frequency of reports on Bitcoin exchanges being compromised is on an increase. However, the extent of damage is not always clear, except in cases where the targetted platform decides to divulge the details in the name of transparency.
Sometimes it takes years before the user gets to know the full story. LeakedSource, a website that keeps track of stolen user information has published information about the security breaches experienced by BTC-E and BitcoinTalk in 2014 and 2015 respectively.
The recent update on LeakedSource states that the hackers who attacked BTC-E in October 2014 stole data belonging to 568,355 users. The data stolen by hackers included usernames, registered email addresses, passwords, IP addresses of BTC-E customers, registration dates, language preferences and other information regarding the total Bitcoin balance held by each user account.
Similarly, the May 2015 attack on BitcoinTalk seems to have compromised personal information belonging to 499,593 users. The stolen BitcoinTalk data includes usernames, email addresses, passwords, birthdates, secret questions, hashed secret answers and other pieces of data belonging