The AES encryption algorithm is a block cipher that uses an encryption key and a several rounds of encryption A block cipher is an encryption algorithm that works on a single block of data at a time. In the case of standard AES encryption the block is 128 bits or 16 bytes in length. The term “rounds” refers to the way in which the encryption algorithm mixes the data re-encrypting into fourteen times depending on length of key.
ENCRYPTION KEYS
AES encryption uses a single key as a part of they encryption process. The key is 128 bits. The term 128 bit encryption refers to use of a 128 bit encryption key. With AES both encryption and decryption are performed using the same key. This includes Symmetric encryption algorithm. Encryption algorithm that uses two different keys a public and a private key are called asymmetric encryption algorithm. An encryption key is simply a binary string of data used in the encryption process. Because the same encryption key is used to encrypt and decrypt data, it is important to keep the encryption key a secret and to use keys that are hard to guess.
ENCRYPTION PSEUDOCODE
For the decryption process, the reverse process of the pseudo code is followed with all the rounds performed.
VII. HASH IMPLEMENTATION
SHA1 is a hashing algorithm which stands for Secure Hashing Algorithm, it is widely used in many application including SSL,TLS,SSH.
SHA1 ALGORITHM DESCRIPTION
Padding which pads the message with a single one followed by zeroes until the final block has 448 bits.. Append the size of the original message as an unsigned 64 bit integer. Initialize the 5 hash blocks (h0, h1, h2, h3, h4) to the specific constants defined in the SHA1 standard. Hash for each 512 bit block. Allocate an...
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...ing packet transmission across multiple associated links.
X. REFERENCES
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[2] L. Schnauzer and V. D. Gligor, “A key-management scheme for distributed sensor networks,” in Proc. 2002 ACM CCS, pp. 41–47.
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[4] W. Du, J. Deng, Y. Han, S. Chen, and P. Varshney, “A key management scheme for wireless sensor networks using deployment knowledge,” in Proc. 2004 IEEE INFOCOM, pp. 586–597.
[5] C. Castelluccia and A. Spognardi, “A robust key pre-distribution protocol for multi-phase wireless sensor networks,” in Proc. 2007 IEEE Securecom, pp. 351–360.
[6] D. Liu and P. Ning, “Establishing pair wise keys in
M. Ito, A. Saito, and T. Nishizeki. Secret sharing scheme realizing general access structure. In Proceedings of the IEEE
What is encryption? Encryption is a technological technique that protects and secures the transfer of plain text information between two sources through the use of the internet. This is done by rearranging the text using a mathematical algorithm that renovates the message into an indecipherable form, which can only be unlocked and translated with a use of a key. The strength of the encryption key is measured by its length, which is determined by the number of bits and by the type of encryption program.
Asymmetric Encryption is used to protect the data while in movement. Asymmetric Encryption is also known as Public Key Encryption. It uses two related keys, a public key and a private key which is not shared with anyone. This pair of keys are developed by mathematical methods which can be solved in one direction. So anyone can encode a data using the public key but only the user with a private key can decode that specific data. The length of Asymmetric Key Encryption is normally 1024 or 2048 bits. However, in Asymmetric framework the keys with smaller than 2048bits are considered as not safe to use.
Johnson, D., Maltz, D. (1996). Dynamic Source Routing in Ad-hoc Wireless network. Print ISBN: 0 79239697 0
... in Wireless Sensor Networks: Current proposal and Future Development, IEEE Xplore, Hong Kong, Oct- 2007.
Roberts, Richard M. "Network Secrurity." Networking Fundamentals. 2nd ed. Tinley Park, IL: Goodheart-Willcox, 2005. 599-639. Print.
Data Encryption is from the cryptography science, which includes coding and decoding of message to protect the safety. Development computer technology makes the encryption even more complicated. The ability for people to break codes is increasing, so are the ability to guard the codes. Many encryptions are available now. They were developed by some hi-tech company and sold, or you can choose some free service. Actually, when you are using the web browsers, emails, or even the basic system, your information has been automatically encrypted.
It has been demonstrated that a number of interoperable systems must be implemented to fully protect a network; a strategy known as Defense in Depth. Due to the multitude of security devices and device categories available, it can be very difficult to identify the correct tools for meeting security goals. Using the Defense in Depth strategy will require an understanding of the interactions between devices occuring within the network.
National Institute of Standards and Technology. (January 19, 2001). Advanced Encryption Standard (AES) Fact Sheet. Retrieved December 8, 2001 from http://csrc.nist.gov/encryption/aes/aesfact.html
Computer science is a vast field that includes nearly everything relating to computers. Everyday there is information transmitted all over the Internet. Pictures are uploaded, transactions are made on thousands of online retail websites, and banking transactions take place everyday on the Internet. All of these transactions have created a need for secure communications. People wish to keep things like banking, medical, and political information from the eyes of unwelcome parties. This has created a need for cryptography. Cryptography is the science or study of the techniques of secret writing, especially code and cipher systems, and is used by everyone from the average citizen to the government and military.
Sensor Network Topology: The topology of the sensor network must be maintained even with very high node densities.
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
ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest in designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers. INTRODUCTION
De Poorter, E., Troubleyn, E., Moerman, I., & Demeester, P. (2011). IDRA: A flexible system architecture for next generation wireless sensor networks. Wireless Networks, 17(6), 1423-1440. doi:http://dx.doi.org/10.1007/s11276-011-0356-5
This paper is going to discuss wireless security from a broad view where I will go into why exactly wireless security is so important especially today as the ways in which we are communicating is changing dramatically. From there I will discuss the multiple wireless securities that are available to give a better understanding of the options given. Then I will go into why exactly not protecting your wireless can be so dangerous with some descriptions on the most dangerous wireless attacks out there today. Finally I will then discuss how we can better prepare for these types of attacks with a synopsis on several effective security methods that will help to ensure data is securely passed and kept hidden.