A timeout time used when acquiring data is decided based on data to be acquired from a server.

An information processing apparatus includes: a processor configured to: extract a first feature word from a first document to which both a first user and a second user have an access right; extract contents associated with an operation log of the first user; and control access of the second user to the contents by using the first feature word.

A method and system for processing information. An apparatus divides target information into N pieces of divided data using a secret sharing scheme in which a predetermined number (K) of pieces of the N pieces of divided data is required to restore the target information, wherein N>K. The apparatus is an information processing device or an external storage device. The apparatus selects M pieces from the N pieces (K<M<N). After selecting the M pieces, the M pieces are stored in the external storage device which limits a totality of pieces of the N pieces being stored on the external storage device to the M pieces. After storing the M pieces, the target information is restored from at least K pieces of the N pieces after which D pieces of the M pieces in the external storage device are destroyed (D>M−K).

A method of controlling a data processing device, the method comprising: receiving, at the data processing device, a communication from a remote device wherein the communication comprises verification data; verifying the verification data at the data processing device; initiating an action by a watchdog associated with the data processing device based on the verification.

A non-transitory tangible recording medium stores recorded AV data. The AV data includes a system stream file played by a playback device and a management information file having management information corresponding to the system stream file. The system stream file includes a first segment including repeated a first data unit that be decrypted using a first decryption key that the playback device individually has and a second data unit that cannot be decrypted by the first decryption key. The system stream file also includes a second segment which can be decrypted using a second decryption key that the playback device has in common with another playback device. The management information file has a start source packet number, which identifies a start source packet out of a plurality of source packets storing an I-picture that is a random access point, and the start source packet is situated in the second segment.

A method for determining completion of a data migration that results from a distributed agreement protocol (DAP) change within a distributed storage network (DSN). The method begins by transferring, in accordance with the DAP change, encoded data slices to one or more other storage units within the DSN. The method continues by maintaining a storage unit migration tracking repository that tracks migration of the encoded data slices. The method continues by maintaining a storage pool migration tracking repository based on the storage unit migration tracking repositories of the plurality of storage units. The method continues by maintaining a DSN migration tracking repository based on the storage pool migration tracking repositories of the plurality of storage pools. The method continues by indicating completion of the data migration as a result of the DAP change based on information within the DSN tracking repository.

According to an embodiment, a communication device is connected to another communication device through a quantum communication channel and a classical communication channel to share an encryption key. The device includes a photon detector, a measurer, a difference generator, and a transmitter. The photon detector is configured to detect photons transmitted from the other communication device through the quantum communication channel. The measurer is configured to measure time when each photon is detected by the photon detector as time stamp information. The difference generator is configured to generate difference time stamp information as a difference between time obtained by adding particular information to the time indicated by the time stamp information previously measured by the measurer and time indicated by the time stamp information subsequently measured by the measurer. The transmitter is configured to transmit the difference time stamp information to the other communication device through the classical communication channel.

An information processing apparatus includes: a memory that stores, for each of a plurality of items that can be described in extensions included in a certificate signing request, item names and item contents with associating each of the item names with a respective one of the item contents; an acquiring unit that acquires specific information; a preparation unit that makes out a specific certificate signing request including specific extensions in which a specific item name and a specific item content are described, according to a condition for making out specific extensions which is determined in response to a user's instruction, by acquiring the specific item name and the specific item content from the memory and using the acquired specific information, specific item name and specific item content; and an output unit that outputs the specific certificate signing request to an outside.

A method for execution by a computing device of a dispersed storage network (DSN). The method begins by encrypting a data segment of a data object using a security key to produce an encrypted data segment. The method continues by dispersed storage error encoding the encrypted data segment to produce a set of encoded data slices and sending the set of encoded data slices to storage units of the DSN for storage. The method continues by encrypting the security key using an encryption key to produce an encrypted security key and dispersed storage error encoding the encrypted security key to produce a set of encoded key slices, wherein a decode threshold number of encoded key slices is needed to recover the encrypted security key. The method continues by sending the set of encoded key slices to a set of storage units of the DSN for storage therein.

Systems, methods, apparatus, computer readable media and other implementations provide host directory synchronization and management in which a master host directory system constructs, maintains and updates a master host list of all hosts that are identified and managed by constituent host directory systems in a computing environment. The master host directory system obtains host data from the constituent host directory systems through encrypted file transfers between the master and constituent host directory systems. In addition to creating and maintaining the master list of host identities, the master host directory system can also assist in defining and enforcing security measures affecting host creation, operation, updating and termination.