International Business Machines Corporation

Kyndryl, Inc.

Yasuhiro Onoda

Hironori Yuasa

A method and system. An instruction to encrypt plaintext to generate encrypted data from the plaintext is received. The encrypted data is to be stored in a database device in response to a first request received from a client terminal to store the plaintext in the database device. The first request includes the plaintext. Ciphertext is generated by applying both an initialization vector and an encryption key directly to the plaintext. An embedding rule used to generate the encrypted data is selected from a sequence of embedding rules. The encrypted data is stored in the database device, A second request to receive the plaintext data is received from the client terminal. The plaintext is obtained from the encrypted data, by separating the encrypted data into the ciphertext and the initialization vector; and generating the plaintext by decrypting the ciphertext that was separated from the encrypted data.

Encrypting data

A method of querying data including: providing a transaction management table; providing a system-period temporal table; assigning a unique identifier to a transaction; performing a first operation at a first timestamp; writing a first row identifier in the system-period temporal table; writing in the row corresponding to the first row identifier the unique identifier of the first operation in the row begin entry of the system-period temporal table; writing in the row corresponding to the first row identifier a dummy transaction identifier corresponding to a maximum timestamp value of the database system in the row end entry of the system-period temporal table; committing the transaction at a commit timestamp such that the commit timestamp is later than the first timestamp; inserting a row in the transaction management table and inserting values for the unique transaction identifier, the first timestamp and the commit timestamp in the transaction management table.

Timing-based system-period temporal table in a database system

A method and system. Ciphertext is generated by applying both an initialization vector and an encryption key directly to plaintext. The initialization vector is combined with the ciphertext to generate encrypted data, by using an embedding rule to perform the combining.

Access control within a network is established by combining multiple factors to prevent unauthorized access to a computer and/or network target system. The factors which may be combined are selected from a combination of three main factors confirmation that the accessing device which is attempting access is by an authorized user; the access request is made by a device that corresponds to an authorized degree of importance; and the accessing device is connected from a network that corresponds to the authorized degree of importance.

Access control using information on devices and access locations

A method and system. Ciphertext is generated by applying an initialization vector and an encryption key to plaintext. The initialization vector is combined with the ciphertext to generate encrypted data, by using an embedding rule to perform the combining, wherein using the embedding rule includes generating the encrypted data by: dividing the initialization vector into a specified number of bits to obtain an ordered sequence of initialization vector fragments; dividing the ciphertext into a specified number of bits to obtain ciphertext fragments; and distributing the initialization vector fragments between the ciphertext fragments according to the order of the initialization vector fragments in the sequence.

A method and system for encrypting data. Ciphertext is generated from plaintext by applying an initialization vector and an encryption key to the plaintext. The initialization vector is combined with the ciphertext to generate encrypted data, by using an embedding rule to perform the combining.

Method and system for encrypting data

A method and system for encrypting data. An initialization is generated. Ciphertext is generated from plaintext by applying the initialization vector and an encryption key to the plaintext. The initialization vector is combined with the ciphertext to generate encrypted data, by using an embedding rule to perform the combining.

Growing community of inventors

Kanagawa, Japan

Yasuhiro Onoda