Emc IP Holding Company LLC

Brown University

Emc Corporation

James Alan Kelley

Roberto Tamassia

Nikolaos Triandopoulos

Ari Juels

Kevin Bowers

Ronald L Rivest

Alina Oprea

In embodiments, secure compression algorithms are provided that may be employed as a single operation on raw data to produce compressed and encrypted data. In embodiments, the algorithms described herein may be performed using any type of dictionary based encryption. In one embodiment, upon adding a new prefix to a dictionary table, the dictionary table may be permuted to randomize the entries into the table. The randomization may be based upon a permutation value generated by a deterministic pseudo-random generator and/or pseudo-random function. Other embodiments of randomization may be employed to provide secure compression. For example, instead of permuting the entire table upon adding a prefix, the prefix may be randomly added to the table.

Secure compression

Methods and apparatus are provided for private set membership using aggregation for reduced communications. A determination is made as to whether at least one data element of a client is in a data set of a server by: obtaining a transformation of the at least one data element; receiving a response from the server based on the transformation of the at least one data element, wherein the transformation comprises one or more of a Bloom filter-based transformation that employs a Bloom filter comprising a plurality of hash functions and an encryption-based transformation; and determining whether the at least one data element is in the data set based on the response, wherein one or more of the response and the determining is based on a result of at least one aggregation of a plurality of values that depend on the at least one data element and one or more items in the data set.

Methods and apparatus for private set membership using aggregation for reduced communications

Methods and apparatus are provided for encoding and decoding via authenticated error correcting codes, such as secure LT codes, secure Raptor codes, block codes and/or rateless codes. Encoded symbols are generated via an authenticated error correcting code by applying a Luby Transform (LT) code to a plurality of message symbols to produce one or more intermediate symbols using a pseudo random number generator (PRNG) to select the plurality of message symbols to combine to produce the intermediate symbols; encrypting the intermediate symbols to produce encrypted symbols; computing an authentication value, such as a message authentication code (MAC), over one or more of the one or more encrypted symbols; and appending the authentication value to the corresponding encrypted symbols to form the encoded symbols. Block scalable and random scalable constructions are also provided, as well as decoding techniques for all of the constructions.

Methods and apparatus for generating authenticated error correcting codes

A method is performed by a data server of a plurality of data servers connected to a network, the data server including data storage managed by a remote metadata server, the metadata server managing storage of data across the plurality of data servers. The method includes (a) receiving, via the network, an access request from a client, the access request requesting access to a portion of the data storage of the data server, (b) testing whether the access request includes a data server specific token authenticating that the client has been authorized by the metadata server to access the portion of data storage, and (c) in response to testing, providing the client with access to the portion of data storage on condition that the access request includes the token authenticating that the client has been authorized by the metadata server to access the portion of data storage.

Growing community of inventors

Waltham, MA, United States of America

James Alan Kelley