作者:
R. L. Rivest， L. Adleman and M. L. Deaouzos.
关键词:
On data banks and privacy homomorphism
摘要:
Encryption is a well—known technique for preserving the
privacy of sensitive information. One of the basic, apparently
inherent, limitations of this technique is that an information
system working with encrypted data can at most store or retrieve
the data for the user; any more complicated operations seem to
require that the data be decrypted before being operated on.
This limitation follows from the choice of encryption functions
used, however, and although there are some truly inherent
limitations on what can be accomplished, we shall see that it
appears likely that there exist encryption functions which permit
encrypted data to be operated on without preliminary decryption
of the operands, for many sets of interesting operations.
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