With secret key cryptography, a single key is used for both encryption and decryption. As shown in Figure the sender uses the key (or some set of rules) to encrypt the plain text and sends the ciphertext to the receiver. The receiver applies the same key (or ruleset) to decrypt the message and recover the plain text.
Proofreading means examining your text carefully to find and correct typographical errors and mistakes in grammar, style, and spelling. Usually, for those who do not have time, they hire a professional proofreaders to help them do it. Before You Proofread: Set your text aside for a while (15 minutes, a day, a week) between writing and proofing. Some distance from the text will help you see mistakes more easily.
Remember: proofreading is just one part of the overall revision process. Itâs not a good idea to rely on spell-check or grammar-check. They make miss takes two. The Writing Center can help you with revising or proofreading your paper. We can also help you determine which process you need to focus on and how to get started. Written by: Chris Taylor