Distributed Encryption and Decryption Algorithms

In this paper, we describe distributed encryption and decryption algorithms. These algorithms are required in order to make a dependable distributed data storage system in which data is stored in an encrypted form resilient to a number of arbitrarily faulty nodes in the system. By execution of these algorithms, a group of n nodes is able to encrypt or decrypt data with any secret cryptographic function in the system in the presence of up to t arbitrarily faulty nodes, whereas the following requirements are met: ❏ loss of information of up to t nodes never leads to loss of any cryptographic key ❏ t or less nodes are unable to compute a secret cryptographic function and encrypt or decrypt data with it ❏ any group of n t or more nodes may encrypt or decrypt data with any cryptographic