Document Encryption Method with Mechanism of Enigma Machine

Document encryption and decryption ensure document security by protecting the security in data storage and transition, which prevents possible serious information leakage. Recent encryption methods tend to rely on the internet or the powerful calculation ability of computers highly. However, information is shared online and shared offline, requiring encrypting methods that are comparatively less complicated to implement, in some cases, i.e., paper or flash drives. To solve the problem, this paper presents document encryption and decryption method using the mechanism of the Enigma machine. First, we read the document and process it to leave characters only. Then, we encrypt the document into ciphertext using a given key. Finally, we decrypt the ciphertext using the key and obtain the plaintext, the original document. To verify the effectiveness of the proposed method, we encrypt documents and decrypt the ciphertext. The experimental results show that the proposed method outperforms related benchmarks.