文章基本信息

标题：An Enhanced Practical Difficulty of One-Time Pad Algorithm Resolving the Key Management and Distribution Problem
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作者：Abiodun Esther Omolara ; Aman Jantan ; Oludare Isaac Abiodun 等
期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2018
卷号：2233&2234
页码：409-415
出版社：Newswood and International Association of Engineers
摘要：Information theory and cryptography recognize 'One-Time Pads' as 'Perfect Secrecy' in theory, however, until today, they have remained impractical to use because of its key management and key distribution problems, particularly in having to generate and send a new key each time you need to transmit a message. When a key is used more than once in the One-Time Pad encryption scheme, it becomes vulnerable to a pattern analysis attack (known-Plaintext attack). For this reason, the same key must not be used more than once.This problem can be resolved by modifying the algorithm and enhancing the key so that any statistical relationship between the plaintext and ciphertext will be completely concealed. The methodology employed was a combination of some cryptographic primitives to introduce diffusion into the system and a simple randomized form of steganography to hide where the encryption begins. The performance of the proposed scheme was evaluated against the One-Time Pad when the pads were used more than once and a cryptanalysis was performed on both schemes. The result indicates that the enhanced OTP algorithm was suitable to allow the same key for limitless use of encrypting different Plaintext without revealing any pattern. This will solve the key management/distribution problem of having to send a new key everytime a message is to be transmitted and this allows the One-Time Pad scheme practical and allows the same key generated during encryption to be reusable on other Plaintext as many times as desired.
关键词：Cryptography; Cipher; Confusion; Diffusion; One;Time Pad; Security; Crib;Dragging; Cryptanalysis