investigated some additional aspects including a Byzantine fault-tolerant agreement protocol based on quorum addresses to store and transfer the chained proof-of-work solutions, which was vulnerable to Sybil attacks, though.
1)Who developed hashcash, a proof-of-work scheme for spam control?
① David Chaum
② Stefan Brands
③ Adam Back
④ Wei Dai
해설
위 지문의 2~3번째
Journalism Theory
Group 1: Grasping journalistic concepts in India’s sexual harassment case
Background of the ‘Bus sexual harassment’ issue
In September last year, there was an issue brought up as a major strike was held to raise the voice against the mass rape done by six guys to a female college student in a bus in New Delhi. Even India’s Prime Minister has also w
1. Introduction
1.1. Purpose of the Research
English has become the global language used nowadays in commerce, cultural exchanges as well human and diplomatic relations. Hence, English education has become a very important issue for nations all over the world. South Korea as a monolingual country has found in English language a convenient access to the world and this is one of the reasons why t
3rd part.
1. Form of polygamy in Islam
Reality, polygamy rarely appears in Islam world. That is, all Islam nation don't admit polygamy. Polygamy is practiced in 19 of 22 countries. Exceptions are Israel, Turkey and Tunisia.
According to homepage which of professor of arab language department in Busan foreign language university, some reported that on the average, percentage of muslim husb
Ⅰ. The Aims of English Education
Students should study English as a required cultural object so that they may recognize their places in the international society and be provided with fundamental basic for taking part in the future international activities.
1. General Aims of English Education
‣ To cultivate interests and confidence in English and to enhance the ability of 1communicat