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conditional formatting and advance functions of excel 2013 version
IF Function in Excel IF function in Excel checks whether a condition is met and if it’s (TRUE) it returns a value, and another value if the condition does not meets (FALSE). IF function gives excel formula a decision- making capabilities. This function takes three arguments, each separated by a comma. IF function is a very useful and most widely used conditional function in excel, this function is used to give a result based on certain criteria; for example, if condition A is met, then the value should be B, and if the condition is not met the value should be C, this function takes three arguments, the first argument is the criteria while the second argument is the result when the condition is true and third argument is when the condition is false. Syntax =if(logical_test,[value_if_true],[value_if_false])
DES(Data Encrypted Standard)
What is DES? DES is a data encrypted standard in which data is encrypted by using a formula and repeated it 16 times. DES uses diffusion Diffusion is defined as repetition of the formula 16 times for encryption the data/message. DES perform 16 rounds. Input is 64 bit plain text. Output is 64 bit cipher text. Example of DES is Transposition Technique. Step 1: Initial permutation Step 2: Diffusion Step 3: Final permutation Initial Permutation: Take a Data/message of 64 bits in this step. Diffusion: performs 16 rounds In each round, a key Ki is used that is generated by round key generator. Working of round 1 is as follow: Final Permutation: After performing 16 rounds, output is 64 bit cipher text/data/message. Types of DES: Double DES Triple DES Double DES: Only two keys (k1 & k2) are used, and we can say that encryption is performed two times for converting the plain text into cipher text. Security is less as compared to Triple DES. Two times encryption for ci...

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