基于LDPC码的秘密共享方案

Secret sharing scheme based on LDPC

信息安全保密已成为当今信息时代的重要研究课题,因此秘密共享方案应运而生。在秘密共享方案中,利用LDPC码的编码实现秘密份额的分发,在LDPC码中,每一个非零码字都是极小码字,将秘密共享方案里的极小授权集与LDPC码的极小码字联系起来,通过极小授权集,实现秘密的重构。由于秘密份额在信道中传输会受到影响,所以恢复出来的秘密存在误码,所以利用一步大数逻辑译码纠错。实验表明,此方案实现了秘密分享,安全性高,又简单可行。

The secrecy of information safety has become an important research topic m present information age. In consequence, secret sharing scheme arises in this situation. The secret sharing scheme makes secret share＇s distribution come true by LDPC code＇s encoding. In LDPC code, because every nonzero code is minimum code, it connects minimum license sets with LDPC＇s minimum code in secret sharing scheme and it uses minimum license sets to restore secret. Because secret sharing transmission in channel is influenced, the restored secret has error code. So it uses step number logic decoding to correct error. The experiment indicates, the scheme makes secret sharing come true. It has high safety and simplicity.