Abstract- Selective encryption is a technique to save computational complexity or enable interesting new system functionality by only encrypting a portion of a compressed bitstream while still achieving adequate security. Although suggested in a number of specific cases, selective encryption could

Abstract. Selective encryption of visual data and especially MPEG has attracted a considerable number of researchers in recent years. Scalable visual formats are offering additional functionality, which is of great benefit for streaming and networking applications. The MPEG-2 and MPEG-4 standards

As more sensitive data is shared and stored by third-party sites on the Internet, there will be a need to encrypt data stored at these sites. One drawback of encrypting data, is that it can be selectively shared only at a coarse-grained level (i.e., giving another party your private key). We

partial encryption (PE), selective encryption (SE) and image compression. The PE is performed in the ROI selected from the image by specifying a color range. The SE is performed by using the Advanced Encryption Standard (AES) algorithm with the Cipher Feedback (CFB) mode on a subset of the Huffman

Selective encryption is a new trend in content protection. It aims at reducing the amount of data to encrypt while achieving a sufficient and inexpensive security. This approach is particularly desirable in constrained communication (real time networking with delay constraints, mobile communication

Selective encryption exploits the relationship between encryption and compression to reduce encryption requirements, saving in complexity and facilitating new system functionality. Selective encryption of MPEG video streams has been proposed in a number of variations, yet has seen little

Abstract. Some applications require high-speed encryption even at the expense of reduced security. With a xed secure, but slow cryptographic algorithm, there still is an appealing possibility for encryption speedup by encrypting only some portion of data. In this paper we analyze the ciphertext

applications like, for example, searching through a shared image database. The principle of selective encryption is first applied to uncompressed images. Then we propose a simple technique applicable to the particular case of JPEG images. This technique is proven not to interfere with the decoding process

In this paper, we start to investigate the security implications of selective encryption. We do this by using the measure guesswork, which gives us the expected number of guesses that an attacker performs in an optimal brute force attack to reveal an encrypted message. The characteristics

Selective Encryption provides the ability to strike a balance between security and processing demands, e.g. in mobile clients. Image encoding using wavelets and especially wavelet packets can be used for efficient selective encryption. We will show how two such methods work, and discuss