Random Clipboard

The application performs the following steps:

1. Generates a random string of a predefined length (16 characters).
2. Allocates global memory for the string to be copied.
3. Locks the memory and stores the random string within it.
4. Opens the system clipboard, and clears existing content.
5. Sets the clipboard data to the newly generated random string.
6. Closes the clipboard.

Requirements

This application requires a Windows OS due to the use of Windows-specific APIs (Windows.h). The code assumes access to a development environment set up for compiling C++ code using Windows API.

Usage

Compile and run the project. Upon execution, a random alphanumeric string inclusive of characters - and _ will be copied to the clipboard. You can then paste this string into documents or text fields using the standard paste operation (usually Ctrl + V).

use the ROBUSTNESS_TEST to produce big sequence in order to check the true randomness of the pasted value.

Future Improvements

• Add more customization options, such as varying the string length.
• Implement error handling robustly to cover all possible failure modes.
• Extend functionality to work on different operating systems.
• Test the randomness against NIST https://nvlpubs.nist.gov/nistpubs/legacy/sp/nistspecialpublication800-22r1a.pdf

Notes

For efficient operation, it is assumed that the necessary privileges to access the clipboard are granted, and no other application interrupts clipboard operations during the execution of this program.

Results

Methodology :

-Enable ROBUSTNESS_TEST , then run / paste in a text file the result. -Do it enough times in order to allow some test to be functionnal ( Ie. 09 requires > 370k )

Type of Test	P-Value	Conclusion
01. Frequency (Monobit) Test	0.13552379942285117	Random
02. Frequency Test within a Block	0.5212655792267176	Random
03. Runs Test	0.9621318385491681	Random
04. Test for the Longest Run of Ones in a Block	0.37460409559848307	Random
05. Binary Matrix Rank Test	0.8085222442038765	Random
06. Discrete Fourier Transform (Spectral) Test	2.772205500503962e-170	Non-Random
07. Non-overlapping Template Matching Test	0.19822531994447531	Random
08. Overlapping Template Matching Test	0.2979594702189787	Random
09. Maurer's "Universal Statistical" Test	0.2761824430297729	Random
10. Linear Complexity Test	0.4695357776957204	Random
11. Serial Test:
	0.0	Non-Random
	0.0	Non-Random
12. Approximate Entropy Test	1.7404908037152792e-52	Non-Random
13. Cumulative Sums Test (Forward)	0.24764160329458745	Random
14. Cumulative Sums Test (Backward)	0.13379936272269785	Random

			Conclusion
15. Random Excursions Test:
State	Chi Squared	P-Value	Conclusion
-4	8.550496946855022	0.12839336780792332	Random
-3	2.4550032786885247	0.783255891773456	Random
-2	3.5217567294070027	0.6200981454832732	Random
-1	1.8852459016393441	0.8647847032448897	Random
+1	5.28415300546448	0.3821947962552052	Random
+2	3.796195102206031	0.5791159965934577	Random
+3	5.350373770491801	0.3746319416989386	Random
+4	6.359861442067627	0.2727603307270486	Random
16. Random Excursions Variant Test:
State	COUNTS	P-Value	Conclusion
-9.0	112	0.3680641866673753	Random
-8.0	112	0.33794410862828206	Random
-7.0	125	0.4004349594929455	Random
-6.0	123	0.34434497686429477	Random
-5.0	115	0.23609429952843575	Random
-4.0	117	0.1922573527503768	Random
-3.0	118	0.12864803395403868	Random
-2.0	146	0.26416216867088027	Random
-1.0	170	0.496807878801794	Random
+1.0	178	0.7938193831730679	Random
+2.0	192	0.7859240333961771	Random
+3.0	238	0.19855036446382535	Random
+4.0	292	0.031282495449488024	Random
+5.0	323	0.01471551203791618	Random
+6.0	308	0.04883478271923523	Random
+7.0	308	0.06996066926864757	Random
+8.0	297	0.12390807901734655	Random
+9.0	270	0.2700506171080861	Random

Addendum

• Discrete fourier transform test isn't working on my test suite.
• Did not check serial test.