Secret Double Octopus (SDO) is a Tel Aviv, Israel-based cybersecurity software company that specializes in phishing-resistant, passwordless authentication for enterprise environments. The company's core product is based on proprietary password alternatives for password-based legacy systems and secure communications using secret sharing algorithms, originally developed to protect nuclear launch codes. SDO uses proprietary phone-as-a-token technology to prevent unauthorized use of systems while preventing identity theft.Cybersecurity co Secret Double Octopus raises $15 m, Globes
History The company was founded in 2015 by Raz Rafaeli, Chen Tetelman, Shlomi Dolev, and Shimrit Tzur-David.
In April 2020, the company announced a $15 million Series B round to expand its passwordless authentication and remote-access security solutions for enterprises.Israeli startup Secret Double Octopus raises $15 m. to help end passwords, Jerusalem Post An additional $15 million was raised in January 2024.Passwordless Authentication Start-up Raises $15 million, Calcalist
Awards and recognition Gartner 'Cool Vendor' in 2016 "50 startups that will boom according to VCs", Business Insider "Best in Class" for enterprise passwordless authentication by the Aite Group. 2023 SINET 16 Innovator Award
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