Bob Erdman, from cybersecurity firm Fortra, said the darknet would stay as long as there is a market for drugs, stolen data, and child sexual abuse images.
A Russian regulator has accused both apps of failing to comply with local law, but Telegram boss Pavel Durov accused the state of trying to stifle free speech.
On the second day, an expert witness for the plaintiff argues platforms are designed to ensnare young users in a vicious cycle of addiction and mental illness.
Bob Erdman, from cybersecurity firm Fortra, said the darknet would stay as long as there is a market for drugs, stolen data, and child sexual abuse images.
A Russian regulator has accused both apps of failing to comply with local law, but Telegram boss Pavel Durov accused the state of trying to stifle free speech.
On the second day, an expert witness for the plaintiff argues platforms are designed to ensnare young users in a vicious cycle of addiction and mental illness.