An Automated Approach to Solve Simple Substitution Ciphers

R, Ramesh S.; Athithan, G.; Thiruvengadam, Kannan

doi:10.1080/0161-119391867872

Cited by 12 publications

(8 citation statements)

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“…A transposition cipher hides information by reordering the letters of the message. In a transposition cipher the plaintext remains the same, but the order of characters is shuffled around [13]. Thus the frequency analysis on the ciphertext would reveal that each letter has approximately the same [11].…”

Section: Encrypting Messagementioning

confidence: 99%

“…Steganography is the invisible communication between the sender and the receiver [14]. In Steganography, only the sender and the receiver know the existence of the message, whereas in cryptography the existence of the encrypted message is visible to the world [13]. For this reason, steganography removes the unwanted attention coming to the media in which the message is hidden [30].…”

Section: Introductionmentioning

confidence: 99%

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Secure Data Transmission Using Steganography and Encryption Technique

Laskar¹

2012

IJCIS

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With the spread of digital data around the world through the internet, the security of the data has raised a concern to the people. Many methods are coming up to protect the data from going into the hands of the unauthorized person. Steganography and cryptography are two different techniques for data security. The main purpose in cryptography is to make message concept unintelligible, while steganography aims to hide secret message. Digital images are excellent carriers of hidden information. We propose a method of combining steganography and cryptography for secret data communication. In this paper, we propose a high-performance JPEG steganography along with a substitution encryption methodology. The approach uses the discrete cosine transform (DCT) technique which used in the frequency domain for hiding encrypted data within image. Experimental results show that the visual and the statistical values of the image with encrypted data before the insertion are similar to the values after the insertion thus reduces the chance of the confidential message being detected and enables secret communication. The effectiveness of the proposed method has been estimated by computing Mean square error (MSE) and Peak Signal to Noise Ratio (PSNR).

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Section: Encrypting Messagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Secure Data Transmission Using Steganography and Encryption Technique

Laskar¹

2012

IJCIS

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“…substitution method, A substitution cipher substitutes one piece of information for another. In substitution cipher each character in the plaintext is substituted for another character in the ciphertext [13]. Such ciphertext could be transmitted across a network or stored within a file system with the disguise serving to provide confidentiality [25].…”

Section: Encrypting Messagementioning

confidence: 99%

“…Steganography is the invisible communication between the sender and the receiver [14]. In Steganography, only the sender and the receiver know the existence of the message, whereas in cryptography the existence of the encrypted message is visible to the world [13]. Due to this, Steganography removes the unwanted attention coming to the media in which the message is hidden.…”

Section: Introductionmentioning

confidence: 99%

Combining Jpeg Steganography and Substitution Encryption for Secure Data Communication

Laskar¹,

Hemachandran²

2012

Computer Science &Amp; Information Technology (CS &Amp; IT)

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“…Also worth mentioning are the articles by Ganesan and Sherman (1993), which proposed new probability distributions to help in automatically distinguishing between a given language and random text, very useful for key exhaustion, and the paper by Cain and Sherman (1994), where the authors broke the Gifford stream cipher. Ramesh, Athithan, and Thiruvengadam (1993) proposed a very original patterns-based attack against simple substitution ciphers.…”

Section: State Of the Artmentioning

confidence: 99%