The Securities and Exchange Board of India (Sebi) had carried out a similar exercise in 2017 in a matter related to circulation of messages through WhatsApp. Perpetrators of such fraud use various marketing techniques to attract subscribers on their social media channels. But because group chats and the channel features are not end-to-end encrypted, Galperin said user privacy is potentially under threat. In view of this, the regulator has cautioned investors not to rely on such investment tips / advice received through social media platforms. It has also said investors should exercise utmost caution while taking investment decisions while dealing in the securities market. Some privacy experts say Telegram is not secure enough
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