A Transparent Encryption Scheme for Watermarked Biometric and Medical Images

Clinical Assessment of Watermarked Medical Images

Problem statement: Digital watermarking provides security to medical images. Watermarking in Region Of Interest (ROI) however distorts medical images but it is known that the resulting loss of fidelity is visually imperceptible. Approach: Clinical assessment will objectively evaluate the distortion on medical images to see whether or not medical diagnosis is altered. We used 75 medical images c...

A stack-based chaotic algorithm for encryption of colored images

In this paper, a new method is presented for encryption of colored images. This method is based on using stack data structure and chaos which make the image encryption algorithm more efficient and robust. In the proposed algorithm, a series of data whose range is between 0 and 3 is generated using chaotic logistic system. Then, the original image is divided into four subimages, and these four i...

Security of a Biometric Identity-based Encryption Scheme

Biometric identity-based encryption (Bio-IBE) is a kind of fuzzy identity-based encryption (fuzzy IBE) where a ciphertext encrypted under an identity w′ can be decrypted using a secret key corresponding to the identity w which is close to w′ as measured by some metric. Recently, Yang et al. proposed a constant-size Bio-IBE scheme and proved that it is secure against adaptive chosen-ciphertext a...

An encryption scheme for JPEG2000 codestream based on packets header information and data encryption for confidentential medical images transmission

In this paper, a novel selective encryption scheme for JPEG2000 codestream is proposed. Many of proposals format compliant encryption schemes for JPEG2000 that have been made encrypt packet body data, but leave header packet in plaintext. Our proposed scheme encrypts code-blocks data corresponding to some sensitive precincts. This encryption is combined to a cyclic permutation of all packets he...

A cost-effective encryption scheme for color images