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- W1923648392 abstract "We present a result related to encryption, shared storage and similarity. The new protocol for secure storage of information solves a recent problem of how multiple independent and non-communicating individuals/processes can and retrieve the same file in a shared storage facility without the use of a key escrow facility. That is, we present a method in which each individual i stores the ciphertext CM,i for the same message M in shared storage at different time with a protocol requiring O(1) ciphertext memory size (i.e., a ciphertext whose size is independent of the number of individuals). Though the individuals can store / create the ciphertext for M at different times without communicating with one another or having pre-shared secret data, they must also be able to decrypt the same ciphertext at different times without communicating directly or indirectly with one another. As will be noted in the Introduction, this problem is motivated by approaches used by cloud storage providers. We further extend the result by enhancing the technique to allow an individual i to $C_{M_i,i}$ where each Mi is similar, but possibly different, yet use less memory than storing multiple ciphertext of each messages.The result has practical implications in privacy and shared storage as has recently been demonstrated by a regulatory complaint to a cloud storage provider. The result uses multiple techniques from both cryptography and coding theory." @default.
- W1923648392 created "2016-06-24" @default.
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- W1923648392 date "2012-01-01" @default.
- W1923648392 modified "2023-09-24" @default.
- W1923648392 title "Efficient Encryption and Storage of Close Distance Messages with Applications to Cloud Storage" @default.
- W1923648392 cites W1995875735 @default.
- W1923648392 doi "https://doi.org/10.1007/978-3-642-28368-0_29" @default.
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