Abstract: A method for secure online collaboration is provided. The method includes providing a graphical user interface (GUI) for online collaborative editing of a document in association with a first server of a cloud-based storage system, receiving an edit to a portion of the document via the GUI, encrypting the edit to the portion of the document based on a data encryption key associated with a second server that is independent of the first server, generating encrypted data representing the edit to the portion of the document, wherein the encrypted data includes the encrypted edit to the portion of the document, and providing the encrypted data to the first server that is unable to decrypt (i) the document in the encrypted form, and (ii) the encrypted edit to the portion of the document.

Abstract: A method for secure online collaboration is provided. The method includes receiving, at a server of a cloud-based storage system, an encrypted edit from a first client device. The cloud-based storage system stores a plurality of documents in an encrypted form. The method also includes determining a document of the plurality of documents that is associated with the encrypted edit. The server is unable to decrypt both the document in the encrypted form and the encrypted edit. The method further includes determining a plurality of user accounts of collaborators of the document. The plurality of user accounts includes a first user account associated with the first client device. The method further includes providing the encrypted edit to one or more other client devices that are each associated with one of the plurality of user accounts.

Abstract: A method for secure online collaboration is provided. The method includes receiving, at a server of a cloud-based storage system, first encrypted data from a first client device. The cloud-based storage system stores a plurality of documents in an encrypted form. The method also includes determining a document of the plurality of documents that is associated with the first encrypted data. The document is not accessible to the server in a decrypted form. The first encrypted data represents an edit to a portion of the document. The method further includes determining a plurality of user accounts of collaborators of the document. The plurality of user accounts includes a first user account associated with the first client device. Moreover, the method includes providing the first encrypted data to one or more other client devices that are each associated with one of the plurality of user accounts, excluding the first user account.

Abstract: A method for secure online collaboration is provided. The method includes receiving, at a server of a cloud-based storage system, first encrypted data from a first client device. The cloud-based storage system stores a plurality of documents in an encrypted form. The method also includes determining a document of the plurality of documents that is associated with the first encrypted data. The document is not accessible to the server in a decrypted form. The first encrypted data represents an edit to a portion of the document. The method further includes determining a plurality of user accounts of collaborators of the document. The plurality of user accounts includes a first user account associated with the first client device. Moreover, the method includes providing the first encrypted data to one or more other client devices that are each associated with one of the plurality of user accounts, excluding the first user account.