Trend Micro Inc.

Yusong Zhang

Bharath Kumar Chandrasekhar

Jeremy Hubble

Liang-seng Koh

A cloud-based email system is accessed by way of a cloud access security system. The cloud access security system allows for encryption of incoming emails and outgoing emails stored in the cloud-based email system. The cloud access security system includes a protocol proxy for providing an interface between a client computer of a user and the cloud-based email system, an encryption module for indexing and encrypting emails, and an event listener for receiving email event notifications from the cloud-based email system and replacing emails with corresponding encrypted emails. The cloud access security system may receive encryption keys from a key manager hosted by a key server, which may be part of the cloud access security system or hosted on premise in the same private computer network as client computers employed by users.

Security system for cloud-based emails

A cloud access security system provides security to data stored in the cloud. The cloud access security system maintains version service information that indicates servers that service web services calls to particular versions of a cloud application service. Upon detection of a web service call to an unknown version of the cloud application service, the cloud access security system redirects the web service call to a known good server that services web service calls that are made to a previous version of the cloud application service. The cloud access security system may employ an encryption scheme that allows for partial decryption.

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San Jose, CA, United States of America

Yusong Zhang