Read through the article published in Tech Xplore by the National Research Council of Science & Technology on 22 July 2022 entitled: Researchers create key technology for quantum cryptography commercialization accessible here: https://techxplore.com/news/2022-07-key-technology-quantum-cryptography-commercialization.html and also attached as part of this assignment.

1 In your own words, summarise the main points articulated in this article.
2 The article mentions the use of public and private keys. What type of cryptographic algorithms makes use of these?
3 What is quantum key distribution (QKD)? You may use any additional sources to answer this question.
4 According to the article, what are the technical issues that need to be addressed before QKD can reach commercialization?