PE-AONT: Partial Encryption combined with an All-or-Nothing Transform
This work addresses secure data storage and transmission for applications requiring efficient encryption, though it appears incremental as it builds on known fragmentation and transform methods.
The authors tackled the problem of secure data fragmentation by introducing PE-AONT, a novel algorithm that combines partial encryption with an all-or-nothing transform to achieve faster performance than existing techniques, with data protection ensured unless all fragments are gathered by an attacker.
In this report, we introduce PE-AONT: a novel algorithm for fast and secure data fragmentation. Initial data are fragmented and only a selected subset of the fragments is encrypted. Further, fragments are transformed using a variation of an all-or-nothing transform that blends encrypted and non-encrypted fragments. By encrypting data only partially, we achieve better performance than relevant techniques including data encryption and straightforward fragmentation. Moreover, when the ratio between the number of encrypted and non-encrypted fragments is wisely chosen, data inside fragments are protected against exposure of the encryption key unless all fragments are gathered by an attacker.