Information processing apparatus, tampering detection apparatus, information processing method, tampering detection method, and computer product
US9071420B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Oct 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An information processing apparatus includes a processor configured to identify a data length that is longer than a data length of plain text data and that is a multiple of a predetermined block length; calculate a data length difference of the data length of the plain text and the data length; generate a first code that indicates the calculated data length difference; generate a second code that is calculated from the plain text data and is of a data length that is within a remaining data length acquired by subtracting a data length of the generated first code from the data length difference; create padding that includes the generated second code, has the first code at an end, and is of a length equivalent to the data length difference; concatenate the created padding to an end of the plain text data to generate concatenated data; and output the concatenated data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.