Microsoft Technology Licensing, LLC

Zenmutech, Inc

Atsushi Kunii

Takayuki Shirahama

Shimpei Kunii

Kiyoshi Tomomura

Jun-ichi Oketani

Yusuke Ishida

A data processing apparatus includes a processing circuit configured to segment an original bit sequence into a plurality of input blocks each having a first block length, create a random bit sequence, encrypt respective ones of the plurality of input blocks with a block cipher scheme using a key (having a key length larger than the first block length) based on the random bit sequence to derive intermediate blocks, concatenate every predetermined number of intermediate blocks to form one or more output blocks, compute an invertible transformation function on the one or more output blocks and the random bit sequence to derive a further output block, and output an encrypted bit sequence including those output blocks.

Data processing device, method, and computer program

In an access management system for managing access to data handled on a shared server, the data in a registered folder on the shared server is kept in secret through transform using an access key. A database in the system is configured to store identification information of n shares generated by splitting the access key using threshold secret sharing scheme in association with a data path of a folder assigned to a first user. Some of the shares are retained in the system as system shares and at least one remaining share is provided to the first user as a user share. When an access request is received along with a first user share from the first user, target data recovered using the access key recovered based on a number of shares that satisfies the quorum is deployed to the registered folder.

Access management system, access management method and program

Aspects of the present disclosure are directed to providing flexible and efficient communication by dynamically adjusting a transmit data rate in response to data status feedback. Such feedback may include information regarding data errors and/or latency. A first communication node communicates with a second communication node and sends data at an initial data rate. The transmit data rate is then selectively adjusted based on data status feedback received from the second communication node or other destination.

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Tokyo, Japan

Atsushi Kunii