The purpose of the Discussion Board is to allow students to learn through sharing ideas and experiences as they relate to course content and the DB question. Because it is not possible to engage in two-way dialogue after a conversation has ended, no posts to the DB will be accepted after the end of each unit.

To gain a better understanding of hashing algorithms, download the DOS-based MD5 hashing utility from this Web site. A zip file will be downloaded, and you will need to unzip the files.

If you prefer, you can download a windows-based utility, the MD5 & SHA-1 Checksum Utility from this Web site.

Complete the following four steps

1. Create a file with some text in it, run the MD5 (or the MD5 & SHA) utility, record your results
2. Edit the file, change something in the file, run the MD5 (or the MD5 & SHA) utility, record your results
3. Edit the file again, and change the file back to its original contents, run the MD5 (or the MD5 & SHA) utility, and record your results
4. Create a copy of the file, run the utility on both files, and record your results

On the Discussion Board, in 2–3 paragraphs, describe a hashing algorithm, how they work to ensure data integrity, and the differences between the MD5 and SHA utilities.

Also, in 1–2 paragraphs, share the results of the exercise. Describe the changes, if any, to the hash values and under what circumstance did the hash value change.

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