This paper starts with an overview of [the Boston Community Information System], and then discusses the problem of reliable digital broadcast communication … parameters based on observed channel error characteristics. A … [p. 460] Recall that the underlying packet layer does … intact, it may be transmitted more than once. … interleaving these redundant transmissions: all the packets of … is necessary to achieve the desired expected level … [p. 465: encryption by master key and encrypted session key. Uses a linear feedback shift register with period10^9 (output of byte0= xor of byte0, byte1 shifted right and byte7 shifted left) xor'd with a nonlinear filter (mid byte of product of high and low word of the shift register).
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