• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Trapdoor Digital Shredder: A New Technique for Improved Data Security without Cryptographic Encryption

Vol. 14, No. 3, March 31, 2020
10.3837/tiis.2020.03.018, Download Paper (Free):

Abstract

Along with the increase of the importance of information used in practice, adversaries tried to take valuable information in diverse ways. The simple and fundamental solution is to encrypt the whole data. Since the cost of encryption is increasing along with the size of data, the cost for securing the data is a burden to a system where the size of the data is not small. For the reason, in some applications where huge data are used for service, service providers do not use any encryption scheme for higher security, which could be a source of trouble. In this work, we introduce a new type of data securing technique named Trapdoor Digital Shredder(TDS) which disintegrates a data to multiple pieces to make it hard to re-construct the original data except the owner of the file who holds some secret keys. The main contribution of the technique is to increase the difficulty in obtaining private information even if an adversary obtains some shredded pieces. To prove the security of our scheme, we first introduce a new security model so called IND-CDA to examine the indistinguishability of shredded pieces. Then, we show that our scheme is secure under IND-CDA model, which implies that an adversary cannot distinguish a subset of shreds of a file from a set of random shreds.


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Cite this article

[IEEE Style]
T. Youn and N. Jho, "Trapdoor Digital Shredder: A New Technique for Improved Data Security without Cryptographic Encryption," KSII Transactions on Internet and Information Systems, vol. 14, no. 3, pp. 1249-1262, 2020. DOI: 10.3837/tiis.2020.03.018.

[ACM Style]
Taek-Young Youn and Nam-Su Jho. 2020. Trapdoor Digital Shredder: A New Technique for Improved Data Security without Cryptographic Encryption. KSII Transactions on Internet and Information Systems, 14, 3, (2020), 1249-1262. DOI: 10.3837/tiis.2020.03.018.