Currently, researchers are orienting their effort to selective encryption in order to protect video sequences against attacks during their transmission over a public channel. The reasons for this trend are of great importance. The encryption module is inserted into the video compression chain to reduce the computation time, ensure the security and reduce the video data amount. This paper presents a chaos based encryption method inserted in the H.264 Advanced Video Coding (AVC). The selective encryption was applied on Context Adaptive
Variable Length Coding (CAVLC) and on the signs of motion vectors. Results were deducted according to the values of Peak Signal to Noise Ratio (PSNR), Structural SIMilarity (SSIM) and the Encryption Rate (ER).
Combining Selective Encryption of CAVLC (SE-CAVLC) and motion vector sign encryption (MVSE) are interesting to enhance the encryption efficiency and to damage the visual quality of the decoded video for both
Intra and Inter predicted frames.
The security of data transmitted through a public channel is a primary objective. Certainly, for the transmission of still pictures and video, compression is necessary to reduce the data amount and therefore avoid clutter of public communication networks. So cryptography is grafted with compression to secure the transmission of such data. Known that standard encryption algorithms are unable to encrypt large amounts of data in real time specially for applications where time is a critical factor as the issue of satellite programs and telemedicine [1], selective encryption is an approach that encrypts parts of the data to reduce the computation time and ensure their security during transmission while maintaining a certain level of compression. The video compre...
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In the rapidly developing field of computer science, there is no more controversial issue than encryption. Encryption has become a highly contested issue with the broad use of global networks including the Internet. As more and more sensitive documents are being placed on computer networks, and trusted information is being sent from computer to computer throughout the world, the need for encryption has never been greater. However, the effects of encryption on our lifestyle and the government's role in encryption has been (and will continue to be) debated for years to come.
5. Royal Philips Electronics, Imaging : its digital future, Briefing, Volume 3, Issue 2, article no. 19.
Today’s businesses and organizations need privacy. They need to keep their employee’s information, trade secrets, financial records, and many other sensitive documents that cannot be shown to the public. To do this, these organizations use encryption. Encryption is using an irreversible program to turn a file into gibberish. To translate the gibberish back to the original contents of the file, you must use a decryption program and provide a password. This is so the program can decrypt the file correctly. This encryption is what prevents cybercriminals who happen to get a hold of any files from looking at file contents. To the cybercriminal, encrypted files are completely useless unless he can figure out how it was encrypted. In order to decrypt the file, the cybercriminal must first find a series of steps that can decrypt the file over and over again: an algorithm.
Encryption: - Data encryption is the best way to reduce risks associated with misplaced, lost or stolen data.
Data encryption refers to the process of transforming electronic information into a scrambled form that can only be read by someone who knows how to translate the code. In nowadays business world, it’s the easiest and most practical way to secure the information that we stored and processed, and it’s significant for our sensitive information. For example, as electronic commerce is popular now, the vendors and retailers must protect the customers’ personal information from hackers or competitors. They also have many business files or contracts that need to be strictly protected. Without data encryption, these important information may fall into wrong hands and be misused by others. Besides, data encryption may be used to secure sensitive information that exists on company networks, or create digital signatures, and help to authorize in business. No one should underestimate the importance of encryption. A little mistake in encryption may make sensitive information revealing, or even result in illegal and criminal accuse.
And it is worth mentioning that the Department of Defense has given this standard of encryption …
The task would not be easy due to the drastic changes in that industry during the 90’s. The two companies bet all their funds and based all their future wealth on two different alternatives. Nevertheless, these two alternatives were analogue based technologies that have been replaced rapidly in 1996 by the most cheap and higher quality digital satellite broadcasting with its standard known as DVB . The latter technology allows scrambling of the signals, stereo sounds and wide screen support. A lot of scrambling system has appeared during this period. The most secure one remains the Videoguard NDS system developed by an Israeli firm for BSkyB.
Despite the numerous advantages offered by cloud computing, security is a big issue concerned with cloud computing. There are various security issues and concerns associated with cloud computing, among them being phishing, data loss and data privacy. There are different mitigation measures that cloud pioneers are currently using to ensure data stored in the cloud remain secure and confidential as intended. Encryption is one mitigation method used to ensure security in cloud computing. According to Krutz and Vines (2010), encryption involves coding of the data stored in the computing cloud such that hackers cannot gain access to the data. Data encryption seems to be the most effective method of ensuring security in computing (Krutz and Vines, 2010). However, it is of paramount importance to note that encrypted data is usually difficult to search or perform various calculations on it.
Data encryption refers to the transformation of data into a structure that makes it unreadable by anyone without a secret decryption key. It ensures that messages can be read only by the planned recipient. Encryption is the procedure of obscuring information to create it unreadable without special information. Only organizations and individuals with an abnormal need for secrecy have actually made good use of it. Nowadays, encryption is one of the most important technologies for maintaining your privacy and the security of important information. This helps out greatly especially when E-Commerce is being used.
The protection of data being transferred between ATMs and the bank, and the use of cell phones is the most common everyday encounter with encryption. To encrypt and decrypt information a cipher is used. In a cipher there is a set of well-defined steps that can be followed to encrypt and decrypt messages. The use of a cipher relies greatly on the use of an encryption key. The key may contain any auxiliary information added to the cipher to produce certain
Due to growth of multimedia application, security becomes an important issue of communication and storage of images.Encryption is one of the ways to ensure high securityImages are used in many fields such as medical science, military; they are stored or transfer through network, security of such image data is important.This work proposes a novel scheme for the security of such images by the method of separable reversible data hiding in encrypted images. In the first phase, a content owner encrypts the original uncompressed image using an encryption key. Then, a data-hider may compress the least significant bits of the encrypted imageusing a data-hiding key to create a sparse space to accommodate some additionaldata.With an encrypted image containing additional data, if a receiverhas the data-hiding key, he can extract the additional data thoughhe does not know the image content. If the receiver has the encryption key,he can decrypt the received data to obtain an image similar to the originalone, but cannot extract the additional data. If the receiver has both thedata-hiding key and the encryption key, he can extract the additional dataand recover the original content without any error by exploiting the spatialcorrelation in natural image when the amount of additional data is not toolarge.
The usage of information systems within daily business and personal affairs for the transmission of confidential or even personal identifiable information, requires the usage of such as cryptography technology to secure the information. Three major forms of cryptography for digital transmission and data storage are hybrid, asymmetric, and symmetric cryptography algorithms, that provide security to protect the integrity, confidentiality, reliability, and authenticity of data transmissions and storage. (Rouse, 2008) However, each technology possesses individual traits and characteristics best suited for types of data transmission and storage. As symmetric key uses two identical keys for transmission and decryption, asymmetric employs a private
“There are two kinds of cryptography that will stop unauthorized personal from reading sensitive files. Cryptographic strength is measured in the time and resources it would require recovering the plaintext. The result of strong cryptography is ciphertext that is very
More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages; various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military
we are using the AES also known as the (Advanced Encryption Standard) it is used by