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.
Liquor labels always say âproofâ (like â80 proofâ). What does âproofâ actually mean? âDouglas from Minneapolis. Dear Douglas, At first glance the definition of proof makes no sense. It seems needlessly complicated. Proof is the government documentation of a distilled beverageâs alcohol content. In the U.S., if you cut the number in half, you get the actual amount of alcohol in the bottle. Eighty proof means 40 percent of the liquid in the bottle is alcohol. Why use proof when you could simply state 40 percent on the bottle? Proof began here during our 18th-century whiskey trade.