# Virtual Energy Based Encryption And Keying Pdf

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- Encryption in the Microsoft Cloud
- Virtual Energy Based Encryption Keying framework for WSN: A Survey
- Post-quantum cryptography
- Elliptic-curve cryptography

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## Encryption in the Microsoft Cloud

In cryptography , encryption is the process of encoding information. This process converts the original representation of the information, known as plaintext , into an alternative form known as ciphertext. Ideally, only authorized parties can decipher a ciphertext back to plaintext and access the original information. Encryption does not itself prevent interference but denies the intelligible content to a would-be interceptor. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. It is possible to decrypt the message without possessing the key but, for a well-designed encryption scheme, considerable computational resources and skills are required.

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Kaur , Gzs Ptu Published Engineering. A wireless sensor network consists of sensor nodes which are resource limited wireless devices and it is difficult to recharge them due to hostile environment. Energy consumption and security are the main concerning factors during transmission in wireless sensor networks. Therefore it is required to consume minimum energy without risking security of wireless networks.

## Virtual Energy Based Encryption Keying framework for WSN: A Survey

Symmetric-key algorithms [a] are algorithms for cryptography that use the same cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to go between the two keys. Symmetric-key encryption can use either stream ciphers or block ciphers. Symmetric ciphers are commonly used to achieve other cryptographic primitives than just encryption. Encrypting a message does not guarantee that it will remain unchanged while encrypted. Hence, often a message authentication code is added to a ciphertext to ensure that changes to the ciphertext will be noted by the receiver.

Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Since the communication cost is the most dominant factor in a sensor's energy consumption, we introduce an energy-efficient Virtual Energy-Based Encryption and Keying VEBEK scheme for WSNs that significantly reduces the number of transmissions needed for rekeying to avoid stale keys. In addition to the goal of saving energy, minimal transmission is imperative for some military applications of WSNs where an adversary could be monitoring the wireless spectrum. VEBEK is a secure communication framework where sensed data is encoded using a scheme based on a permutation code generated via the RC4 encryption mechanism. The key to the RC4 encryption mechanism dynamically changes as a function of the residual virtual energy of the sensor.

Elliptic-curve cryptography ECC is an approach to public-key cryptography based on the algebraic structure of elliptic curves over finite fields. ECC allows smaller keys compared to non-EC cryptography based on plain Galois fields to provide equivalent security. Elliptic curves are applicable for key agreement , digital signatures , pseudo-random generators and other tasks. Indirectly, they can be used for encryption by combining the key agreement with a symmetric encryption scheme. They are also used in several integer factorization algorithms based on elliptic curves that have applications in cryptography, such as Lenstra elliptic-curve factorization.

This algorithm is worked based on a permutation codes generated via RC5 Encryption mechanism. The key to RC5 algorithm encrypts blocks of plaintext of length.

## Post-quantum cryptography

Post-quantum cryptography sometimes referred to as quantum-proof , quantum-safe or quantum-resistant refers to cryptographic algorithms usually public-key algorithms that are thought to be secure against a cryptanalytic attack by a quantum computer. As of [update] , this is not true for the most popular public-key algorithms, which can be efficiently broken by a sufficiently strong quantum computer. The problem with currently popular algorithms is that their security relies on one of three hard mathematical problems: the integer factorization problem , the discrete logarithm problem or the elliptic-curve discrete logarithm problem. All of these problems can be easily solved on a sufficiently powerful quantum computer running Shor's algorithm. In contrast to the threat quantum computing poses to current public-key algorithms, most current symmetric cryptographic algorithms and hash functions are considered to be relatively secure against attacks by quantum computers.

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### Elliptic-curve cryptography

Android 7. File-based encryption allows different files to be encrypted with different keys that can be unlocked independently. This article describes how to enable file-based encryption on new devices and how system applications can use the Direct Boot APIs to offer users the best, most secure experience possible. File-based encryption enables a new feature introduced in Android 7. Direct Boot allows encrypted devices to boot straight to the lock screen.

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A wireless sensor network consists of sensor nodes which are resource limited wireless devices and it is difficult to recharge them due to hostile environment.

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Customer data within Microsoft's enterprise cloud services is protected by a variety of technologies and processes, including various forms of encryption.