@Misc{RS87b, author = { Ronald L. Rivest and Adi Shamir }, title = { Method and apparatus for resuing non-erasable memory media }, howpublished = { U.S. Patent 4,691,299. }, date = { 1987-09-01 }, OPTyear = { 1987 }, OPTmonth = { September 1, }, urla = { google-patent-page }, abstract = { Storage media such as digital optical disks, PROMS, and paper tape consist of a number of bit positions which initially contain a "zero" and which can later be irreversibly overwritten with a "one". An apparatus and method provide for rewriting in such "non-erasable memories" for expanding their capacity by allowing the non-erasable memory to be rewritten one or more time. }, }