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Title:
An Encryption Scheme based on Random Split of St-Gen Codes
Authors: Simona Samardjiska, Danilo Gligoroski
Abstract:Staircase-Generator codes (St-Gen codes) have recently been introduced in the design of code-based public key schemes and for the design of steganographic matrix embedding schemes. In this paper we propose a method for random splitting of St-Gen Codes and use it to design a new coding based public key encryption scheme. The scheme uses the known list decoding method for St-Gen codes, but introduces a novelty in the creation of the public and private key. We modify the classical approach for hiding the structure of the generator matrix by introducing a technique for splitting it into random parts. This approach counters the weaknesses found in the previous constructions of public key schemes using St-Gen codes. Our initial software implementation shows that encryption using Random Split of St-Gen Codes compared to original St-Gen Codes is slower by a linear factor in the number of random splits of the St-Gen code, while the decryption complexity remains the same.
ePrint: https://eprint.iacr.org/2016/202
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