TASKalfa 3500i, TASKalfa 4500i, TASKalfa 5500i
Data Security Kit (E) Overseas Version Security Target
© 2011 KYOCERA MITA Corporation
21
7. TOE SUMMARY SPECIFICATION
This chapter describes the summary specification for the security functions that are
provided by the TOE.
Table 6.1 shows the relations between the TOE security functions and the security
functional requirements.
Table 7.1 TOE security functions and security functional requirements
Security Functions
Functional Requirements
TSF.ENCRYPT
TSF.OVERWRITE
FCS_CKM.1 X
FCS_COP.1 X
FDP_RIP.1 X
7.1. Encryption Function
TSF.ENCRYPT
When operating the basic functions such as the copy function, the network scan
function, the print function and the document management box function, MFP stores
image data in the HDD. The encryption function is a function that encrypts and
stores the image data when image data is stored in the HDD.
(1) FCS_CKM.1 Cryptographic Key Generation
The TOE generates a 128-bit cryptographic key to be used in the AES algorithm by
using the Kyocera Mita’s standard cryptographic key generating algorithm. The key
is generated based on an identical and unique number on the MFP basis, every time
each MFP power is turned on, and is kept in a volatile memory. However,
information for the cryptographic key is set only when starting operation, and shall
not be changed during the operation.
(2) FCS_COP.1 Cryptographic Operation
When storing image data in the HDD, the TOE encrypts the image data, using the
128-bit cryptographic key generated at the time of booting (FCS_CKM.1) and the
AES encryption algorithm based on FIPS PUBS 197, and write into the HDD. When
reading out the stored image data from the HDD, the TOE decrypts the image data,
similarly using the 128-bit cryptographic key generated at the time of booting and
To Next Page
Loading...
