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Java Assignment work

Purpose This assignment will give you practice writing if statements, loops, and manipulating Strings. You will also develop a test suite. Plan to spend a full hour reading this handout so that you thoroughly understand what we are asking for. Do this before you start programming! Take notes as you read. What classes do we want? What are the method names for each? If you notice parts that are unclear, then please send an email to your instructor or post a message to the newsgroup. Hints and announcements will be posted on the course website. Introduction When people perform credit card transactions or share electronic files, they expect and deserve their information to be protected. Keeping information private (ensuring secure transmission of data) is a major research area of computer science, which affects much of the general public. Cryptography is the practice of encrypting data so that it can only be decrypted by the intended receivers(s). Encrypting data means converting plaintext (the data in its original form) to ciphertext (a disguised version of the data). This is done because when the data is transfered from the sender to the intended receiver, the data may be intercepted and viewed by an eavesdropper. Ciphertext is more difficult for an eavesdropper to understand than plaintext. The intended receiver is told how to decrypt the data, so he or she can convert the ciphertext back to plaintext. Here is an overview of the cryptography process:

## Deliverables

What to submit Submit the .java files containing the Cipher, SubCipher, TransCipher, CipherTester, SubCipherTester and TransCipherTester classes of the above assignment Please email me so I can email you my whole assignment

## Platform

I am using windows these are java docs so everything should be submitted as .java

Taidot: tekniikka, Java, MySQL, PHP, tietojärjestelmäarkkitehtuuri, Ohjelmistojen testaus

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