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 In order to check if AES 128 with CBC operation mode can produce randomized-encrypted sequences we check it with all random number tests implemented in DiceLock product.
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Summary
100.000 randomized-encrypted text sequences
| Random test |
Random streams |
Non random streams |
Random streams (%) |
Non random streams (%) |
| Frequency test |
99.928 |
72 |
99,928 % |
0,072 % |
| Block frequency test |
99.943 |
57 |
99,943 % |
0,057 % |
Tests performed and results are shown in the following way:
Random number test
Inputs:
| Number of plaintext sequences tested |
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The number of sequences tested |
| Plaintext sequence lengths |
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Lengths of the sequences been tested |
| Plaintext sequence content |
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Plaintext values being tested
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| Encryption key length |
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Encryption key length in bytes
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| Encryption key values |
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Encryption key values per byte |
| Initialization vector length |
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Initialization vector length in bytes |
| Initialization vector values |
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Initialization vector values per byte |
| Frequency confidence |
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Random confidence level in frequency test
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| Frequency p-value |
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Assigned p-value in accordance to confidence level setted
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Results:
| Random ciphertext sequences |
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The number of ciphertext sequences thar are random based on frequency test
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| Non random ciphertext sequences |
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The number of ciphertext sequences thar are NOT random based on frequency test |
| Random ciphertext sequences (percentage) |
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Percentage of ciphertext sequences thar are random based on frequency test |
| Non random ciphertext sequences (percentage) |
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Percentage of ciphertext sequences thar are NOT random based on frequency test |
Correct deciphered texts
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Number of correct deciphered sequences (to see that encryption algorithms are woking properly) |
| Incorrect deciphered texts |
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Number of incorrect deciphered sequences (to see that encryption algorithms are woking properly) |
Checked Frequency test with data.e file
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Checked Frequency random number test with NIST data.e test file
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Blog: [link to post showing result screenshot]
Frequency test
Inputs:
| Number of plaintext sequences tested |
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100.000 sequences
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| Plaintext sequence lengths |
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from 1.000 bits to 801.000 bits (from 125 to 100.125 bytes, length incremented 1 byte each test) |
| Plaintext sequence content |
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All bytes to value 0 (0x00)
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| Encryption key length |
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128 bits (16 bytes)
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| Encryption key values |
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each key tested has the same byte value for all bytes, values go from 0×00 to 0xff |
| Initialization vector length |
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128 bits (16 bytes) |
| Initialization vector values |
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each initialization vector tested has the same byte value for all bytes, values go from 0×00 to 0xff. |
| Frequency confidence |
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99,9% |
| Frequency p-value |
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0.001 |
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Results:
| Random ciphertext sequences |
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99.928 |
| Non random ciphertext sequences |
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72 |
| Random ciphertext sequences (percentage) |
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99,928 %
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| Non random ciphertext sequences (percentage) |
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0,072 % |
Correct deciphered texts
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100.000 |
| Incorrect deciphered texts |
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0 |
Checked Frequency test with data.e file
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YES |
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Blog: AES 128 (Advanced Encryption Standard) in CBC mode generates randomized encrypted text checked with frequency test at 99,9 per cent confidence
Block frequency test
Inputs:
| Number of plaintext sequences tested |
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100.000 sequences
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| Plaintext sequence lengths |
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from 1.000 bits to 801.000 bits (from 125 to 100.125 bytes, length incremented 1 byte each test) |
| Plaintext sequence content |
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All bytes to value 0 (0x00)
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| Encryption key length |
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192 bits (24 bytes)
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| Encryption key values |
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each key tested has the same byte value for all bytes, values go from 0×00 to 0xff |
| Initialization vector length |
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128 bits (16 bytes) |
| Initialization vector values |
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each initialization vector tested has the same byte value for all bytes, values go from 0×00 to 0xff. |
| Block frequency confidence |
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99,9% |
| Block frequency p-value |
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0.001 |
| Block frequency block length |
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128 bits |
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Results:
| Random ciphertext sequences |
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99.943 |
| Non random ciphertext sequences |
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57 |
| Random ciphertext sequences (percentage) |
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99,943 %
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| Non random ciphertext sequences (percentage) |
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0,057 % |
Correct deciphered texts
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100.000 |
| Incorrect deciphered texts |
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0 |
Checked Frequency test with data.e file
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YES |
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Blog: AES 128 (Advanced Encryption Standard) in CBC mode generates randomized encrypted text checked with block frequency test at 99,9 per cent confidence
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