Encrypt the message “ABCDEFGHIJKLMNOPQRST” using the columnar transposition cipher with the key “3 4 2 5 1”. Use “X” for padding, if needed. 1)CHMR DINS EJOT BGLQ AFKP 2)BGLQ DINS EJOT CHMR AFKP 3)EJOT CHMR AFKP BGLO DINS 4)ABCDE KLMNO PQRST FGHIJ

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Hash Table

A hash table also called a hash map, is a data structure that maps key-value pairs. The hash table can be used in complex systems to provide fast access and compact storage. A hash table is a structure that stores data in an abstract data type kind of associative array. It keeps data in an array format, with a distinct index value for every data value. If the index of the required data is known, then the data can be accessed very easily.