sen-material: hws/hw08.tex@a118052cf1d4 (annotated)

329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	1	\documentclass{article}
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	2	\usepackage{../style}
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	3
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	4	\begin{document}
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	5
442 cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	6
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	7	% For Alice to cheat, she has to get her transaction into the blockchain.
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	8	% For this she has to solve proof-of-work puzzles faster than anybody
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	9	% else. Is it possible for her to precompute several blocks that would
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	10	% validate a fraudulent transaction by her? Give a short explanation
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	11	% for your reasoning.
cceb3d2dcba0 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 440 diff changeset	12
480 ab31912a3b65 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 442 diff changeset	13	\section*{Homework 7}
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	14
493 977c3ac60d62 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 480 diff changeset	15	\HEADER
977c3ac60d62 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 480 diff changeset	16
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	17	\begin{enumerate}
421 38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	18	\item How can the hardness of the proof-of-work puzzles in
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	19	Bitcoins be adjusted? What is parameter that determines
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	20	how the hardness is adjusted?
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	21
421 38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	22	\item What is the main data that is stored in Bitcoin's
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	23	blockchain?
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	24
421 38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	25	\item What is is the purpose of the proof-of-work puzzle in
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	26	Bitcoins?
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	27
421 38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	28	\item The department has large labs full of computers that are
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	29	pretty much idle over night. Why is it a bad idea to let
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	30	them mine for Bitcoins?
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	31
38ddbc59325a updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 330 diff changeset	32	\item Is it possible that Bitcoins can get lost (be
440 66f1d7e4f70b updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 421 diff changeset	33	irretrievable)?
330 323e1290360b updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 329 diff changeset	34
493 977c3ac60d62 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: 480 diff changeset	35	\item \POSTSCRIPT
329 b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	36	\end{enumerate}
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	37	\end{document}
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	38
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	39	%%% Local Variables:
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	40	%%% mode: latex
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	41	%%% TeX-master: t
b124fe3b0e39 updated Christian Urban <christian dot urban at kcl dot ac dot uk> parents: diff changeset	42	%%% End:

author	Christian Urban <urbanc@in.tum.de>
	Wed, 31 May 2017 09:26:47 +0100
changeset 514	a118052cf1d4
parent 493	977c3ac60d62
permissions	-rw-r--r--