Implementation of Vigenere Cipher as Cryptographic Algorithm in Securing Text Data Transmission

Abstract: Data theft is the process of stealing digital information from victims who do not know it in order to jeopardize privacy or obtain confidential information. Data theft becomes a problem for individual computer users, as well as large companies. Every individual has not covered the possibility of information theft because of someone's negligence. In safeguarding data, we need a technique that can help someone in keeping the data a secret. Data theft is unavoidable, but data security can be improved to preve nt data misuse. Vigenere algorithm, which is a cryptographic technique, can help secure data from data misuse. This algorithm works by shifting each character in the plaintext for the key provided. The key used can be a series of characters or are words that are difficult to guess by people who want to commit a crime. Implementing the Vigenere Cipher algorithm will guarantee data security. Key Words: Vigenere Cipher, encryption, decryption, algorithm