hi i want the dis advantages if des algorithm ,please help me ....etc

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To get full information or details of matlab coding for image encryption and decryption using aes algorithm please have a look on the pages

http://seminarsprojects.net/Thread-compact-and-efficient-encryption-and-decryption

if you again feel trouble on matlab coding for image encryption and decryption using aes algorithm please reply in that page and ask specific fields in matlab coding for image encryption and decryption using aes algorithm ....etc

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To get full information or details of des algorithm encryption for hello example demo please have a look on the pages

http://seminarsprojects.net/Thread-data-encryption-standard-des?pid=107157

http://seminarsprojects.net/Thread-implementation-of-des-algorithm

if you again feel trouble on des algorithm encryption for hello example demo please reply in that page and ask specific fields in des algorithm encryption for hello example demo ....etc

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i m doing dissertation in cryptography based digital image watermarking for gray scale image..so i need matlab source code for encryption and decryption for gray scale image ....etc

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ABSTRACT

Chaos maps and chaotic systems have been proved to be useful and effective for cryptography. In our study, the two-dimensional logistic map with complicated basin structures and attractors are first used for image encryption. The proposed method adopts the classic framework of the permutation-substitution network in cryptography and thus ensures both confusion and diffusion properties for a secure cipher. The proposed method is able to encrypt an intelligible image into a random-like one from the statistical point of view and the hum ....etc

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RSA

The RSA cryptosystem is a public-key cryptosystem that offers both encryption and digital signatures (authentication). Ronald Rivest, Adi Shamir, and Leonard Adleman developed the RSA system in 1977 .RSA stands for the first letter in each of its inventors' last names.

The RSA algorithm works as follows: take two large primes, p and q, and compute their product n = pq; n is called the modulus. Choose a number, e, less than n and relatively prime to (p-1)(q-1), which means e and (p-1)(q-1) have no common factors except 1. Find another numb ....etc

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Recent investigations of image encryption algorithms have increasingly relied on chaotic systems, but the drawbacks of small key space and weak security in one-dimensional chaotic crypto systems are obvious. This paper, a new image coding scheme employing one of three dynamic chaotic systems (chaotic Lorenz or Chen system or selected 16-byte key based LU) to mix the position of image pixels (position permutation of Pixels) and uses another of the same three chaotic maps to confuse the relationship between the encrypted image and the simple imag ....etc

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To get full information or details of image steganography please have a look on the pages

http://seminarsprojects.net/Thread-steganography-in-images-download-seminar-report

http://seminarsprojects.net/Thread-image-steganography-project-in-java-source-code--63924

http://seminarsprojects.net/Thread-disadvantages-of-existing-system-image-steganography

http://seminarsprojects.net/Thread-image-steganography-powerpoint

http://seminarsprojects.net/Thread-implementation-of-image-steganography-using-lsb-techinque?page=2

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S-DES Algorithm:-

Encryption:- Encryption algorithm takes an 8-bit block of plaintext and 10-bit key as input and produce an 8-bit block of ciphertext as output.
1. Encryption algorithm involves five functions:
1) an initial permutation function (IP)
2) a complex function (fk) which involves both substitution and permutation
3) a simple permutation function (SW) that switches two halves of data
4) the function f again
5) a permutation function that is the inverse of the initial permutation(IP-1).
2. The function fk takes as input ....etc

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Hi
Kindly help me out with the matlab code for image encryption using catmap technique. ....etc

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