1,254 research outputs found
F-term Inflation in M-theory with Five-branes
We study F-term inflation in M-theory with and without five-brane moduli
fields. We show the slow rolling condition is not satisfied in M-theory without
five-brane moduli fields, but it can be satisfied in the case with
non-vanishing F-terms of five-brane moduli fields.Comment: 11 pages, latex, 2 figure
Bitstream-Based JPEG Image Encryption with File-Size Preserving
An encryption scheme of JPEG images in the bitstream domain is proposed. The
proposed scheme preserves the JPEG format even after encrypting the images, and
the file size of encrypted images is the exact same as that of the original
JPEG images. Several methods for encrypting JPEG images in the bitstream domain
have been proposed. However, since some marker codes are generated or lost in
the encryption process, the file size of JPEG bitstreams is generally changed
due to the encryption operations. The proposed method inputs JPEG bitstreams
and selectively encrypts the additional bit components of the Huffman code in
the bitstreams. This feature allows us to have encrypted images with the same
data size as that recoded in the image transmission process, when JPEG images
are replaced with the encrypted ones by the hooking, so that the image
transmission are successfully carried out after the hooking.Comment: to appear in 2018 IEEE 7th Global Conference on Consumer Electronics,
Nara, JAPAN, 10th Oct., 201
- …