In  Lamport's Hash we mentioned the notion of using only 64 bits of the hash. At each stage, 128 bits are computed, 64 bits are thrown away, and the hash of the retained 64 bits is used in the next stage. The purpose of only using 64 bits is so that a human does not need to type as long a string. Assuming the person will still only type 64 bits, does it work if hashn does a hash of all 128 bits of hashn-1, but what the person actually transmits is 64 bits of the result?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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In  Lamport's Hash we mentioned the notion of

using only 64 bits of the hash. At each stage, 128 bits

are computed, 64 bits are thrown away, and the hash of

the retained 64 bits is used in the next stage. The

purpose of only using 64 bits is so that a human does not

need to type as long a string. Assuming the person will

still only type 64 bits, does it work if hashn does a hash

of all 128 bits of hashn-1, but what the person actually

transmits is 64 bits of the result?

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