How to Reuse a "Write-Once" Memory

  title={How to Reuse a "Write-Once" Memory},
  author={Ronald L. Rivest and Adi Shamir},
  journal={Information and Control},
Storage media such as digital optical disks, PROMS, or paper tape consist of a number of "write-once" bit positions (wits); each wit initially contains a "0" that may later be irreversibly overwritten with a "1." It is demonstrated that such "write-once memories" (woms) can be "rewritten" to a surprising degree. For example, only 3 wits suffice to represent any 2-bit value in a way that can later be updated to represent any other 2-bit value. For large k, 1.29.... k wits suffice to represent a… CONTINUE READING
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