Security without identification: transaction systems to make big brother obsolete
Communications of the ACM
Communications of the ACM
Privacy amplification by public discussion
SIAM Journal on Computing - Special issue on cryptography
Data encryption based upon time reversal transformations
The Computer Journal
On hiding information form an oracle
Journal of Computer and System Sciences
Encryption and Secure Computer Networks
ACM Computing Surveys (CSUR)
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Cryptography and data security
Cryptography and data security
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Much has been written about the necessity of processing data in the encrypted form. However, no satisfactory method of processing encrypted data has been published to date. Ahitub et al. [2] have analyzed the possibilities of using some special algorithms to add encrypted data. Rivest et al. [10] have suggested the use of an algorithm based on homomorphic functions for processing encrypted data. The main limitation of this algorithm is that such functions can be broken by solving a set of linear equations, as noted by [2]. The public-key crytosystem described in [11] can be used to multiply encrypted data but cannot be used to add encrypted data and is therefore not appropriate for some practical applications such as bank transactions. Abadi, Feigenbaum and Kilian [1] presented some general theorems concerning the problem of computing with encrypted data and formulated a framework to prove precise statements about what an encrypted instance hides and reveals; they also described encryption schemes for some well-known functions.