I have modified a cryptographic algorithm, and now I would like to analyze it. Can anyone suggest a best tool that can be used? (If possible open software).
I suggest you Java and .NET. to simulate cryptography programs.
Thank you Mr. AR Reddy for your deeper insights and suggestions... I would also look into it.
Mr. Santhosh Kumar Sahu thank you very much.
If the algorithm can be written in Matlab, it is easy to test the strength of the encryption algorithm using images. The histogram analysis, adjacent pixel correlation analysis, mean value analysis and key space analysis. can be obtained with the encrypted image. Also we can obtain encryption quality, encryption speed with different images of same and different sizes. Then the results can be compared with any other encryption algorithm. It requires that the algorithms be written in Matlab.
@Paul A.J :
The strength of of an encryption algorithm lies in not able to decrypt the cipher value or obtain the key value by an adversary.
How histogram analysis, adjacent pixel correlation analysis, mean value analysis indicate the strength of an encryption algorithm ?
Can you please give details ?
To start with we must consider a standard encryption algorithm such as AES as a bench mark. AES has been used world-wide as an encryption standard that has not been reported being cracked by any adversary till date. Now we can compare the results obtained in AES as well as the encryption algorithm under consideration in terms of the above analysis. We can say that the analysis shows that the algorithm is able to achieve such desirable characteristics similar to AES. These analysis are only qualitative and not quantitative.
Hi Jeril!
Maybe, the best way to analyse your algorithm is to submit it to be analysed by the community. Given the high complexity involved, until I know, there are no automated software able to analyse.
On the other hand, if you just want to analyse some specific metric on it (e.g.: cipher speed), you can use, as Paul said, an well known algorithm as a parameter.
Best regards,
Walter
C/C++, C# programming languages and Network Simulator(NS2), Matlab, python
Dear Jeril
There is no general tool for analyzing the strength of. any cryptographic algorithm
There are some tools for analyzing some properties of those algorithms, but they depend on the type of algorithm.
To analyze the properties of the S-boxes in a block cipher I suggest the SET software.
To analyze the statistical properties of the output of a stream cipher I suggest the statistical test package proposed as standard by the NIST. You must carefully interpret the results.
The NIST battery only studies the randomness of the output, but not the possible correlations between the output and an element of the internal state
Best regards
Professor Carlos Miguel Legón Perez
Dear Jeril
To analyze the correlation between the Output of a stream cipher and the, elements of its internal state, I suggest you consult :
https://www.mdpi.com/2076-3417/10/21/7668
Best regards
C. M Legón
You could also consult :
E. J. M. Capó, O. J. Cuellar, C. M. L. Pérez and G. S. Gómez, "Evaluation of input — output statistical dependence PRNGs by SAC," 2016 International Conference on Software Process Improvement (CIMPS), 2016, pp. 1-6, doi: 10.1109/CIMPS.2016.7802810.
Another more recent tool to analyze the properties of the S-boxes used in Block Ciphers , you can see it at :
https://www.researchgate.net/publication/350912697_BSAT_A_New_Tool_for_Analyzing_Cryptographic_Strength_of_Boolean_Function_and_S-Box_of_Symmetric_Cryptosystem
Best Regards
Carlos Miguel Legón Perez
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