Xianglian Jin The GNU Privacy Guard (GnuPG) is GNU ’s tool for secure communication and data storage. It can be used to encrypt data‚ create digital signatures‚ and help authenticating using Secure Shell and to provide a framework for public key cryptography. It includes an advanced key management facility and is compliant with the OpenPGP and S/MIME standards. Gpg4win is GNU Privacy Guard for Windows and Kleopatra is the certificate manager in Gpg4win. To create OpenPGP and X.509 certificates‚ Gpg4win
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encryption algorithm 4 ▪ Triple DES ▪ Diffie-Hellman key exchange 5 ▪ International Data Encryption Algorithm (IDEA) 3 ▪ El Gamal encryption algorithm ▪ Carlisle Adams and Stafford Taveres (CAST) algorithm ▪ Elliptic curve cryptography (ECC) ▪ Blowfish ▪ Secure Sockets Layer (SSL) ▪ Advanced Encryption Standard (AES) 1 ▪ Digital signature Scenarios: 1. Shovels and Shingles is a small construction company consisting of 12 computers that have Internet
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Networks and Distrib. Sys. Modeling and Simulation Conf.‚ Jan. 2002‚ pp. 27–31. [7] M. G. Zapata‚“Secure Ad-Hoc On-Demand Distance Vector Routing”‚ ACM Mobile Comp. Commun. Rev.‚ Vol. 6‚ No. 3‚ July 2002‚ pp.106-07. [8] A. Juels et al.‚“Minimalist Cryptography for Low-Cost RFID Tags”‚ Proc. 4th Int’l. Conf. Security in Commun. Networks‚ LNCS 3352‚ Springer-Verlag‚ 2004‚ pp-149-64. [9] Bok Yong Choi‚ Deok Gyu Lee‚“RHDP-Scheme for RFID’s Efficiency Improvement on the Ubiquitous Computing”‚ SpringerLink
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attacks are designed to subvert the security of cryptographic algorithms‚ and they are used to attempt to decrypt data without prior access to a key. They are part of Cryptanalysis‚ which is the art of deciphering encrypted data. Cryptanalysis and Cryptography (the art of creating hidden writing‚ or ciphers) form the science of Cryptology. Cryptographic Attack Methods There are six related cryptographic attack methods‚ including three plaintext-based methods and three ciphertext-based methods:
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communications‚ it is referred to as sniffing or snooping. The ability of an eavesdropper to monitor the network is generally the biggest security problem that administrators face in an enterprise. Without strong encryption services that are based on cryptography‚ your data can be read by others as it traverses the network. Data Modification After an attacker has read your data‚ the next logical step is to alter it. An attacker can modify the data in the packet without the knowledge of the sender or receiver
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satisfied with an asymmetric digital signature and not by a symmetric signature. nonrepudiation 7 True or False: Cipher text is a mechanism for accomplishing confidentiality‚ integrity‚ authentication‚ and nonrepudiation. False 8 True or False: Cryptography is a mechanism for accomplishing confidentiality‚ integrity‚ authentication‚ and nonrepudiation. True 9 True or False: Access control is a mechanism for accomplishing confidentiality‚ integrity‚ authentication‚ and nonrepudiation. False 10 True
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Fortress‚ the unbreakable algorithm. "Strathmore’s vision had been bold - a world encryption standard with a back door for the NSA" Chapter 96 (page 412) This passage shows the government conspiracy aspect of the book. Strathmore is the head of cryptography section of the NSA‚ and he had planned to put a back door in the computer program Digital Fortress. His back door key would allow him access to decrypt anything that was out on the internet without the public or the EFF‚ the leading civil liberties
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encryption is Cellular Automata (CA). CA is a self-organized structure with a set of cells in which each cell is updated by certain rules that are dependent on a limited number of neighboring cells. The major disadvantages of cellular automata in cryptography include limited number of reversal rules and inability to produce long sequences of states
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information secret‚ you have two possible strategies: hide the existence of the information‚ or make the information unintelligible. Cryptography is the art and science of keeping information secure from unintended audiences‚ of encrypting it. Conversely‚ cryptanalysis is the art and science of breaking encoded data. The branch of mathematics encompassing both cryptography and cryptanalysis is cryptology. This method of secrecy has existed since 1900 B.C. in the form of Egyptian hieroglyphs. Up to
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International Journal of Computer Applications (0975 – 888) Volume 47– No.12‚ June 2012 Database Security and Encryption: A Survey Study Iqra Basharat Farooque Azam National University of Sciences and Technology (NUST)‚ H-12‚ Islamabad‚ Pakistan National University of Sciences and Technology (NUST)‚ H-12‚ Islamabad‚ Pakistan ABSTRACT Security in today’s world is one of the important challenges that people are facing all over the world in every aspect of their lives. Similarly
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