Encryption has a remarkably long and varied history. spies have been using it to convey secret messages ever since there were secret messages to convey. one powerful method of encryption uses random digits. two documents are prepared with the same random sequence of numbers. the spy is sent out with one and the spy master retains the other. the digits are used as follows. suppose that the word to be encrypted is spy and the random digits are 352. then s becomes v (three letters after s), p becomes u (five letters after p), and y becomes a (two letters after y, restarting at a after z). the spy would encrypt a message and then destroy the document used to encrypt it. this is an early example of a. a hashing algorithm. b. asymmetric key encryption. c. symmetric key encryption. d. public key encryption.

Assignment directions the owner of a popular local coffee shop has approached you to design a network for his business. he would like to offer his customers wifi access to the internet, but also thinks it might be handy to network the kitchen and store room together with the office computer he already uses for ordering, scheduling, and payroll. he thinks that might save him time doing inventory control and ordering. your assignment is to create a set of questions for him that will precisely define the purpose of the network and any constraints and restrictions on its implementation. assignment guidelines create a list of at least ten questions to ask your customer. of those ten questions, at least one question must come from each of the following subject areas: purpose of the network network access and security issue network availability and fault tolerance issues future expansion issues vendor issues briefly explain in two or three sentences why you would ask each question and what you expect to learn from your customer’s response. submission requirements your questions should meet the criteria of a good survey question by being specific, unambiguous, and closed-ended. all questions, as well as your explanations, should be written in proper english using correct grammar, spelling, and punctuation. use complete sentences, and do not use slang, texting abbreviations, or shortcuts.

Eva has many contacts on the professional networking site she uses which contacts are considered second degree

Me ! evelyn is a manager in a retail unit. she wants to prepare a report on the projected profit for the next year. which function can she use? a. pmt b. round c. division d. what-if analysis