Russia's media and internet regulator has asked a court to block the encrypted messaging app Telegram after the company refused to give its encryption keys to state authorities. The regulator, known ...

"I won't tell you the exact time when the block on Telegram will begin," he said. "My work is to fulfill this irreproachably in technical terms. This may take days, hours, or minutes." Roskomnadzor is ...

Zero-correlation linear cryptanalysis is an important method to analyze the security of block ciphers. But there are few works on zero-correlation linear attacks combined with the related-key setting.