Multiple encryption

Multiple encryption refers to the process of encrypting data using a cascade of identical ciphers, where the stage keys may or may not be independent and the stage ciphers can be either a block cipher or its corresponding decryption function. Double and triple encryption are two common examples of multiple encryption, where the data is encrypted twice or thrice using the same or different keys.From: Digital Video Transcoding for Transmission and Storage [2019], Handbook of Applied Cryptography [2018]

Block Ciphers

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Published in Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone, Handbook of Applied Cryptography, 2018

Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone

Regarding Note 7.41, see Biham [131] (and earlier [130]) as well as Coppersmith, Johnson, and Matyas [278]. Biham’s analysis on DES and FEAL shows that, in many cases, the use of intermediate data as feedback into an intermediate stage reduces security. 15 years earlier, reflecting on his chosen-plaintext attack on two-key triple-encryption, Merkle [850, p.149] noted “multiple encryption with any cryptographic system is liable to be much less secure than a system designed originally for the longer key”.

Encryption Method for Blockchain based Data for Safe Transmission Using Fuzzy Algorithm

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Published in IETE Journal of Research, 2022

Ruihong Zhang, Zhihua Hu

The objectives of this work are as follows: To explore the OPES-based encryption method to encrypt the first character in the sequence before encryption the sequence is sorted.To modify the Hill sequence cipher for making it more robust to encrypt the remaining characterset to ensure the secure distribution of the encryption key.To secure the data transmission through multiple encryption methods, i.e. OPES based encryption and optimized Hill sequence cipher for blockchain transmissions.To compare the proposed security mechanism with the existing works to check the robustness of the method.

Multiple encryption

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Encryption Method for Blockchain based Data for Safe Transmission Using Fuzzy Algorithm