HENNGE K.K. provides cloud security services worldwide. Its offerings include HENNGE One IdP Edition, an identity and access management solution with single sign-on; HENNGE One E-Mail Security Edition, which helps prevent ransomware, fraud, and targeted attacks and stops emails from being sent to unintended accounts; Customers Mail Cloud, a cloud-based email delivery service; and HENNGE Lock, which provides flexible OTP solutions. The company was formerly known as HDE, Inc. and changed its name to HENNGE K.K. in February 2019. It was incorporated in 1996 and is headquartered in Tokyo, Japan.