Details

Autor(en) / Beteiligte

• Yuan, Sheng
• Yao, Jianbin
• Liu, Xuemei
• Zhou, Xin
• Li, Zhongyang

Titel

Cryptanalysis and security enhancement of optical cryptography based on computational ghost imaging

Ist Teil von

• Optics communications, 2016-04, Vol.365, p.180-185

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Optical cryptography based on computational ghost imaging (CGI) has attracted much attention of researchers because it encrypts plaintext into a random intensity vector rather than complexed-valued function. This promising feature of the CGI-based cryptography reduces the amount of data to be transmitted and stored and therefore brings convenience in practice. However, we find that this cryptography is vulnerable to chosen-plaintext attack because of the linear relationship between the input and output of the encryption system, and three feasible strategies are proposed to break it in this paper. Even though a large number of plaintexts need to be chosen in these attack methods, it means that this cryptography still exists security risks. To avoid these attacks, a security enhancement method utilizing an invertible matrix modulation is further discussed and the feasibility is verified by numerical simulations. •We find that the CGI-based encryption scheme is vulnerable to chosen-plaintext attack.•Three strategies of chosen-plaintext attack have been proposed.•A security enhancement method based on invertible matrix modulation has been investigated.•Numerical simulations are carried out to verify the effectiveness of the proposed method.