Method for encrypting data for distributed storage
Abstract:
A method for encrypting data with an encryption entity includes, in a step a), dividing a plaintext into a number of N blocks. In a step b), each of the blocks are encrypted with an encryption key resulting in a number of ciphertext blocks. In a step c), a linear All-Or-Nothing scheme is applied on the ciphertext blocks. In a step d), each of the ciphertext blocks output from step c) is transformed with a transformation procedure such that the information in different ciphertext blocks is transformed differently based on the encryption key and such that the transformation procedure is only revertable with knowledge of the encryption key. In a step e), the transformed ciphertext blocks are dispersed according to an information dispersal procedure.
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