Indias leading online shopping app has sent a legal notice to a US security firm claiming it has been hacked. Paytm Mall has denied that it has suffered any security breach. Last week a Twitter account connected to Indian Prime Minister Narendra Modi was hijacked by hackers. Last month Cyble claimed that a hacking group known as John Wick had uploaded unauthorised code to the Paytm Group’s website and had demanded a ransom of 10 ETH (approximately US $4,000) be paid.”]