Abstract: A floor system in a server room includes a main panel and a sub-panel. The main panel includes main panel inlaid cables and main panel connectors where the main panel inlaid cables connect a first set of the main panel connectors to a second set of the main panel connectors. The sub-panel includes sub-panel inlaid cables and sub-panel connectors where the sub-panel inlaid cables connect the sub-panel connectors to one another. The floor system provides an operating floor via the main panel and the sub-panel where the operating floor is raised relative to a sub-floor and the main panel is a removable floor panel to access a space between the operating floor and the sub-floor. The main panel inlaid cables and the sub-panel inlaid cables establish a current pathway from a power source.

Abstract: A registration device (500) accepts plaintext, attribute information of a user having an authority of referring to the plaintext, and a registration key for use in generating a user key for generating a search query. The registration device generates aggregate information indicating one or more aggregate values, by aggregating a plurality of attribute values included in the attribute information. The registration device generates generalized information indicating a plurality of generalized values for each aggregate value by generalizing each aggregate value included in the aggregate information. The registration device generates ciphertext data including the plaintext encrypted, by using the plaintext, the attribute information, the generalized information, and the registration key. The registration device registers the ciphertext data in a database.

Abstract: A ciphertext conversion system (100) includes a conversion key generation device (600). The conversion key generation device (600) includes a conversion destination selling unit and a conversion key generation unit. The conversion destination setting unit generates an attribute-based encryption key and an attribute-based ciphertext which is encrypted from the attribute-based encryption key, according to an attribute-based encryption scheme. The conversion key generation unit generates a conversion key which converts a first common-key ciphertext into a second common-key ciphertext being a ciphertext that matches a first common-key cryptography scheme and that is different from the first common-key ciphertext, on a basis of first common-key cryptographic information used when generating the first common-key ciphertext by encrypting, according to a first common-key cryptography scheme, a plaintext with a first secret key.

Abstract: A logical expression acquisition unit (502) acquires a logical expression that represents a condition under which searchable encryption is permitted, by a logical structure with a plurality of attribute values and a logical operator. An encrypted tag generation unit (504) sets a secret sharing value which reflects the logical structure, to each of the plurality of attribute values, and generates an encrypted tag to be used for the searchable encryption, using a plurality of secret sharing values set to the plurality of attribute values.

Abstract: A registration device (200) generates an encryption keyword by encrypting a keyword with a registration key, generates an index including the encryption keyword and identification information which identifies a corresponding ciphertext, generates a conversion key from the registration key and a search key, and registers a plurality of ciphertexts, the index, and the conversion key in a server device (400). A search device (300) generates a search query by encrypting a keyword, and transmits the search query to the server device (400).

Abstract: A cryptographic system comprising an encryption device to generate a ciphertext; a master re-encryption key generation device to generate a master re-encryption key that cannot decrypt a ciphertext generated by the encryption device, but can generate a re-encryption key for changing an access range for a ciphertext generated by the encryption device; re-encryption device to generate a re-encryption key for re-encrypting a target ciphertext generated by the encryption device, using the master re-encryption key, and re-encrypts the target ciphertext to generate a re-encrypted ciphertext, using the generated re-encryption key; and a decryption device to decrypt at least one of the ciphertext generated by the encryption device and the re-encrypted ciphertext generated by the re-encryption device.

Abstract: A secret search system is configured to generate a search key TDv in which a position of each character of a search character string is specified and set, and to search for, from among a plurality of encrypted tags ETx in which a position of each character of a character-string-to-be-searched is specified and set, an encrypted tag ETx corresponding to the generated se arch key TDv. In particular, the secret search system is configured to search for an encrypted tag ETx including the search key TDv as a partial character string by setting a position t of each character in one of the search key TDv and the encrypted tags ETx, setting a position ?t of each character having a sign obtained by inverting a sign of the position t in the other thereof, and cancelling out, during the search, the position t and the position ?t.

Abstract: A registration device (400) generates ciphertext data using a new data key, generates an encrypted keyword using a new keyword key, and registers a set of the ciphertext data and the encrypted keyword. A search operation device (500) restores an old data key from the new data key, restores an old keyword key from the new keyword key, and generates a new search query and an old search query, using the new keyword key and the old keyword key, respectively. A data management device (600) finds an encrypted keyword that matches one of the new search query and the old search query, and outputs an encrypted search result including ciphertext data corresponding to the encrypted keyword that has been found. The search operation device decrypts a plaintext from the ciphertext data included in the encrypted search result, using one of the new data key and the old data key.

Abstract: A security cable can include a restraining cable and a lock unit attached to the restraining cable. The lock unit can be configured to removably fasten to a computing device. The lock unit can be further configured to switch the security cable between a first configuration and a second configuration. In the first configuration, the lock unit can be fastened to the computing device and can place the computing device in an inactive state. In the second configuration, the lock unit can be removable from the computing device and may not place the computing device in the inactive state.

Abstract: An encryption device (30) generates a session key K and a ciphertext ctS in which the session key K is encrypted that are generated by an encryption algorithm using as input attribute information S. A re-encryption key generation device (40) generates a re-encryption key rk including a converted decryption key sk?˜ generated by setting a random number r in a decryption key sk? with which the ciphertext ctS can be decrypted, a session key K? and a ciphertext ctS? that are generated by the encryption algorithm using as input attribute information S?, and conversion information generated from the random number r. A re-encryption device (50) outputs a re-encrypted ciphertext rctS? including the ciphertext ctS? and a cipher element K˜ generated by deleting an element related to the random number r by the conversion information from decryption information K{circumflex over (?)} obtained by decrypting the ciphertext ctS with the converted decryption key sk?˜ and setting the session key K?.

Abstract: A floor system in a server room includes a main panel and a sub-panel. The main panel includes main panel inlaid cables and main panel connectors where the main panel inlaid cables connect a first set of the main panel connectors to a second set of the main panel connectors. The sub-panel includes sub-panel inlaid cables and sub-panel connectors where the sub-panel inlaid cables connect the sub-panel connectors to one another. The floor system provides an operating floor via the main panel and the sub-panel where the operating floor is raised relative to a sub-floor and the main panel is a removable floor panel to access a space between the operating floor and the sub-floor. The main panel inlaid cables and the sub-panel inlaid cables establish a current pathway from a power source.

Abstract: A privacy filter includes a plurality of micro louvers. Each micro louver of the plurality of micro louvers is a same size. Each micro louver of the plurality of micro louvers are laid flat on top of each other to form the privacy filter. The plurality of micro louvers includes a first micro louver and a set of micro louvers. The first micro louver is in a fixed position. The set of micro louvers has a first piezo element at a first end of each micro louver and a second piezo element at a second end of each micro louver. The first end is opposite the second end.

Abstract: A deduplication system (100) includes encryption apparatuses (400), a conversion key generation apparatus (500), a tag conversion apparatus (600), and a match determination apparatus (700). The encryption apparatuses (400) each generate encryption tag (ETag) using an encryption key (ek) and plaintext (M). The conversion key generation apparatus (500) generates a conversion key (ck) using the encryption key (ek) and a conversion key generation key (tk). The tag conversion apparatus (600) converts an encryption tag (ETag) for which the same plaintext (M) has been used into an encryption tag (T) that takes the same value regardless of a value of the encryption key (ek) used for the encryption tag (ETag) by applying the conversion key (ck) to the encryption tag (ETag). The match determination apparatus (700) determines whether the values of two encryption tags (T) match.

Abstract: An encryption device (50) generates a ciphertext ct encrypted from information x with using an encryption token etk. A decryption key generation device (60) generates a decryption key dk from a user secret key sk in which a vector y is set, with using a decryption token dtk corresponding to the encryption token etk. A privacy-preserving analysis device (70) decrypts the ciphertext ct generated by the encryption device (50), by means of the decryption key dk generated by the decryption key generation device (60), so as to generate a result of computation over the vector x and the vector y.

Abstract: A registration device (500) accepts plaintext, attribute information of a user having an authority of referring to the plaintext, and a registration key for use in generating a user key for generating a search query. The registration device generates aggregate information indicating one or more aggregate values, by aggregating a plurality of attribute values included in the attribute information. The registration device generates generalized information indicating a plurality of generalized values for each aggregate value by generalizing each aggregate value included in the aggregate information. The registration device generates ciphertext data including the plaintext encrypted, by using the plaintext, the attribute information, the generalized information, and the registration key. The registration device registers the ciphertext data in a database.

Abstract: A searchable encryption system includes a registration device including an index generation unit (624) and an encrypted index generation unit (625). The index generation unit (624) generates a registration keyword index by using a registration keyword, authorized-person attribute information corresponding to an authorized person who has an authority to search for the registration keyword, a user key function to generate a user key corresponding to a searcher, a search query function to generate a search query having the user key incorporated therein, and an index query function to generate an index query having the search query incorporated therein. The encrypted index generation unit (625) generates an encrypted index by encrypting the registration keyword index by using the index disclosure key.

Abstract: Provided is a secret search device including an arithmetic processing unit configured to speed up secret search processing by, when the secret search processing is performed by executing a pairing operation relating to each element of an encrypted tag and each element of a trapdoor, and when the pairing operation is executed by using a pre-calculation table stored in a storage unit for each element to be used in the pairing operation. The arithmetic processing unit is configured to execute, based on information on a free space usable for the pre-calculation table, size adjustment of the pre-calculation table such that the pre-calculation table fits in the free space.

Abstract: One or more processors performing an obfuscation action on a display of a first computing device subsequent to activating a transaction application of the first computing device. The method includes one or more processors measuring a distance between the first computing device and a second computing device, wherein the display of the first computing device is directed towards the second computing device. The method further includes the one or more processors determining whether the distance between the first computing device and the second computing device meets a pre-determined threshold distance. In response to determining the distance between the first computing device and the second computing device does meet the pre-determined threshold distance, the method further includes the one or more processors deactivating the obfuscation action on the display of the first computing device and displaying an authorization image directed to the second computing device.

Abstract: A key acquisition unit (411) acquires a decryption key ski in a pair of a conversion source and a public key pkj in a pair of a conversion target, out of a plurality of pairs of a decryption key and a public key. A conversion key generation unit (412) encrypts the decryption key ski acquired by the key acquisition unit (411) with the public key pkj, so as to generate a conversion key rki?j for converting a ciphertext encrypted with a public key pki in the pair of the conversion source into a converted ciphertext that can be decrypted with a decryption key skj in the pair of the conversion target. An output unit (413) outputs the conversion key rki?j generated by the conversion key generation unit (412).

Abstract: A search device (60) determines whether or not an auxiliary tag AT corresponding to an auxiliary query AQ obtained by conversion of a keyword exists, among auxiliary tags AT stored in an auxiliary tag storage unit (632) and obtained by conversion of a search word. When it is determined that the auxiliary tag AT corresponding to the auxiliary query AQ exists, the search device (60) specifies an encryption tag ET corresponding to a search query SQ being set with attribute information x indicating an attribute of a user, and the keyword, among encryption tags ET stored in an encryption tag storage unit (633) and being set with an access condition v indicating an accessible attribute, and the search word.