Patent ID: 8966287
Filing Date: 2015-02-24
Classification: G06F,H04L

Abstract:
1. A computer-implemented method for secure third-party data storage, at least a portion of the method being performed by a computing device comprising at least one processor, the method comprising: identifying, at the server-side computing device, a request from a client system to share access to an encrypted file stored under a user account, wherein the access to the encrypted file comprises access to unencrypted contents of the encrypted file; identifying, in response to the request, an asymmetric key pair designated for the user account, the asymmetric key pair comprising an encryption key and a decryption key that has been encrypted with a client-side key; receiving, from the client system, the client-side key; decrypting the decryption key with the client-side key; identifying a file key used to encrypt the encrypted file, wherein the file key is encrypted with the encryption key; decrypting the file key with the decryption key to create an unencrypted version of the file key; generating a temporary encryption key; encrypting the unencrypted version of the file key with the temporary encryption key to create a temporary encrypted file key; transmitting a temporary decryption key corresponding to the temporary encryption key to share the access to the encrypted file.