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*To*: [email protected]*Subject*: Bekenstein Bound (was: Crypto and new computing strategies)*From*: Hal <[email protected]>*Date*: Wed, 30 Mar 1994 22:05:56 -0800*Sender*: [email protected]

The Deutsch paper I quoted before was where I first heard of the Bekenstein Bound which Eric Hughes mentioned. According to Deutsch: "If the theory of the thermodynamics of black holes is trustworthy, no system enclosed by a surface with an appropriately defined area A can have more than a finite number N(A) = exp(A c^3 / 4 hbar G) of distinguishable accessible states (hbar is the Planck reduced constant, G is the gravitational constant, and c is the speed of light.)" The reference he gives is: Bekenstein, J.D. 1981 Phys Rev D v23, p287 For those with calculators, c is approximately 3.00*10^10 cm/s, G is 6.67*10^-8 cm^3/g s^2, and hbar is 1.05*10^-27 g cm^2/s. N comes out to be pretty darn big by our standards! Hal

**Follow-Ups**:**Re: Bekenstein Bound (was: Crypto and new computing strategies)***From:*Jim choate <[email protected]>

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