Holographic dispersal and recovery of information

A simple scheme for dispersal and recovery of digital information based on the discrete Fourier transform is discussed. The author presents a different implementation of M.O. Rabin's (J. ACM, vol.36, no.2, p.335-48, Apr. 1989) scheme, whose recovery cost is O(log m+k) operations per character, assuming m= Theta (n); for example, when k= Theta (log n), this cost drops from O(m) to O(log m) per character. Since the implementation is based on the Fourier transform, it is termed holographic.<
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