Distributing encoded data for private processing in the cloud
Traditional cryptography techniques require our data to be unencrypted and to be processed correctly. This means that at some stage on a system we have no control over, our data will be processed in plain text. Solutions that allow the computation of arbitrary operations over data securely in the cloud are currently impractical. The holy grail of cryptography, fully homomorphic encryption, still requires minutes to compute a single operation. To provide a practical solution, this chapter proposes taking a different approach to the problem of securely processing data. This is achieved by each cloud service receiving an encoded part of the data, which is not enough to decode the plain-text value. The security strength is shifted from a computation problem to the sheer number possible options. Given the greater threat to data stored in the cloud is from insiders, this is the primary attack vector the presented schemes Bin Encoding and FRagmenting Individual Bits (FRIBs) aim to protect against.
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