The country's rubber-stamp parliament passed the bill on February 28, triggering pushback from rights groups and companies worried about privacy breaches.
Thais go to the polls on March 24 in an election that could see a junta-aligned government come to power, and with it more controls on freedom of expression.
The new bill allows authorities to seize any computers or devices without a court warrant if there are "critical threats" to cybersecurity, which a committee determines in cases of "reasonable suspicion".
The Asia Internet Coalition, an industry association representing companies like Google and Facebook, warned the law was too broadly worded and could give the government sweeping powers to snoop on user data.
"When I talk about cybersecurity, don't get this confused with human rights," the gruff general said, adding that the law was meant to boost online business security. "No one will tap phone calls of others," he said.
"It's about the protection of businesses... because there could be huge fraud or illegal businesses." Since it came into power, the junta has tried to stifle online dissent even as biting satire poking fun at the generals flourishes on the web.
"We cannot control public opinion now that social media controls (it) and everyone has access," he said.
"Thai authorities have a track record of invoking 'security' to allow criminal proceedings against people who did nothing more than peacefully speak their mind," Gerson told AFP.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)