Information security has emerged as one of the most pressing issues in data transmission, and it is now an inextricable aspect of the process. To solve this problem, cryptography can be used. This study presents a secure data transmission method and describes how data might be securely transmitted. Cryptography creates a secure and reliable transmission mechanism that can withstand attacks. The Vigenere cipher is employed in this work to encrypt the plain text content of the electronic mail that will be transmitted to the receiver, and a decryption key is required to convert the encrypted data to plain text. Confidentiality, honesty, usability, and efficacy are all important factors in our tests. The outcome of this study will serve as a guide to better methods for safeguarding and delivering data over the internet. The system was created with the Visual Basic Programming Language and the Microsoft Access Database, and it was successfully installed on the Windows Operating System. All electronic mail users, the military, and organizations that demand a high level of security in messages sent to and from their systems would benefit from our effort.
Cryptography, Information security, Encryption, Decryption, Electronic mail
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