Write a discussion post on following three topics. Each one should be in a separate file, each post should have 2 (scholarly) journal citations, min 300 words each, additional requirements also specified below:Discussion 1:Malicious individuals have discovered several methods to attack and defeat cryptosystems. It’s important that understand the threats posed by cryptographic attacks to minimize the risks to your network systems.Identify one cryptographic attack and how you can protect against it.?Discussion 2):Excel is probably the most popular spreadsheet software for PCs. Why? What can we do with this package that makes it so attractive for modeling efforts?Discussion 3):What are the common business problems addressed by Big Data analytics? In the era of Big Data, are we about to witness the end of data warehousing? Why?Please make your posts substantive. A substantive post will do at least two of the following:· Ask an interesting, thoughtful question pertaining to the topic· Answer a question (in detail) posted by another student or the instructor· Provide extensive additional information on the topic· Explain, define, or analyze the topic in detail· Share an applicable personal experience· Provide an outside source (for example, an article from the UC Library) that applies to the topic, along with additional information about the topic or the source (please cite properly in APA)· Make an argument concerning the topic.Run you submission through grammar check before submitting.At least 2 (scholarly) journal source should be used for each post.Make your references in correct APA 7 format and cite each reference at least once, but as many times as you rely on it. Citations support each sentence relying on a reference, not an entire paragraph. Do not use direct quotes, rather rephrase the author’s words and continue to use in-text citations. Initial posts need to be 300 words minimum .