Locally Updatable and Locally Decodable Codes

  title={Locally Updatable and Locally Decodable Codes},
  author={Nishanth Chandran and Bhavana Kanukurthi and Rafail Ostrovsky},
  journal={IACR Cryptology ePrint Archive},
We introduce the notion of locally updatable and locally decodable codes (LULDCs). In addition to having low decode locality, such codes allow us to update a codeword (of a message) to a codeword of a different message, by rewriting just a few symbols. While, intuitively, updatability and error-correction seem to be contrasting goals, we show that for a suitable, yet meaningful, metric (which we call the Prefix Hamming metric), one can construct such codes. Informally, the Prefix Hamming metric… CONTINUE READING
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Locally updatable and locally decodable codes

  • N. Chandran, B. Kanukurthi, R. Ostrovsky
  • Cryptology ePrint Archive, Report 2013/520,
  • 2013
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