August 2017
« Nov    

Recent Posts

XDiceLock for Apple Mac OS X, ARC4_Discarding class (ARC 4 Discarding stream cipher algorithm) verified with IETF RFC 6229, 80 bit key, set 2 and PhysicalCryptoRandomStream class (memory pages kept in RAM, not swapped to file)

XDiceLock for Apple Mac OS X is the cryptographic architecture that ensures that ciphertext it’s not just encrypted but also randomized.

DiceLock cipher architecture presents two main configurations:
Dicelock Digested, and
Dicelock Indexed.

DiceLock encryption architecture improves symmetric ciphers like block cipher as Advanced Encryption Standard, Camellia, Serpent, Twofish (128, 192 and 256 bit key lengths) with different block cipher operation modes (like CBC, CFB, OFB and XTS) and stream ciphers as HC 128, HC 256, Rabbit, Salsa 20/20, Sosemanuk and others.

DiceLock (both configurations) makes use of the following random number tests: Frequency Test, Block Frequency Test, Cumulative Sum Forward Test, Cumulative Sum Reverse Test, Runs Test, Longest Run Of Ones Test, Rank Test, Universal Test, Approximate Entropy Test, Serial Test and Discrete Fourier Transform Test.

Additionally DiceLock Digested configuration makes use currently of following hash digest algorithms: Sha 1, Sha 224, Sha 256, Sha 384, Sha 512, Ripemd 128, Ripemd 160, Ripemd 256, Ripemd 320, Md2, Md4 and Md5.

Previous version XDiceLock for Apple Mac OS X incorporated XTS-AES (XEX-based tweaked-codebook mode with ciphertext stealing XTS block cipher operation mode algorithm) for Advanced Encryption Algorithm (AES) for 128 and 256 bit symmetric keys.

New version XDiceLock for Apple Mac OS X has made significant improvements:
- added block encryption ciphers like Camellia, Serpent and Twofish with all accepted key lengths of 128, 192 and 256 bits,
- added stream ciphers like Rabbit, Salsa 20/20 with 128 and 256 bit key lengths, and general Sosemanuk, as well as Sosemanuk with 128 and 256 bit key lengths,
- added old hash algorithms like Message Digest 2, Message Digest 4 and Message Digest 5,
- modified DiceLockIndexed and DiceLockDigested classes to be used with encryption ciphers that does not make use of initialization vector (IV),
- created DiceLockIVDigested and DiceLockIVIndexed classes to be used with encryption ciphers that makes use of initialization vector (IV),
- extended DiceLockXTSDigested and DiceLockXTSIndexed classes to be use with newly added Camellia, Serpent and Twofish block ciphers and all three key lengths (128, 192 and 256 bit key lengths),
- added old encryption ciphers like DEA (Data Encryption Algorithm), TDEA (Triple Data Encryption Algorithm), and ARC4 (alleged RC4) for compatibillity reasons.

As the new version XDiceLock for Apple Mac OS X is developed, all individual components must be tested and verified, and in this article we verify ARC 4 Discarding class (computing ARC 4 Discarding stream cipher algorithm).

At the bottom of the post you can find C++ source code being used to perform this test.

Verified XDiceLock for Apple Mac OS X

Verification components:

– Stream encryption cipher algorithm: ARC4_Discarding class
– Discarded initial bytes: 1008
– Test set: IETF RFC 6229, 80 bit key, set 2
– Bit stream memory management: PhysicalCryptoRandomStream class (memory pages kept in RAM, not swapped to file)

Memory characteristic used in this test:

PhysicalCryptoRandomStream class makes use of mlock that uses physical nonpaged memory, preventing that memory from being paged to the swap area, so memory is not swapped to hard disk. The pages are guaranteed to stay in RAM until later PhysicalCryptoRansomStream object is deleted.
In order to use PhysicalCryptoRandomStream class, the process must be privileged (CAP_IPC_LOCK) in order to lock memory, and since Linux 2.6.9, no limits are placed on the amount of memory that a privileged process can lock and the RLIMIT_MEMLOCK soft resource defines the limit on how much memory an unprivileged process may lock.


Input plaintext: 4112 zero bytes
Key: 8b37641910833222772a

Once computed we’ve got the following results:

Byte offset: 0
Expected 8bab26fbc2c12b0f13e2ab185eabf241
Computed 8bab26fbc2c12b0f13e2ab185eabf241
Result: OK
Byte offset: 16
Expected 31185a6d696f0cfa9b42808b38e132a2
Computed 31185a6d696f0cfa9b42808b38e132a2
Result: OK
Byte offset: 512
Expected 564d3dae183c5234c8af1e51061c44b5
Computed 564d3dae183c5234c8af1e51061c44b5
Result: OK
Byte offset: 528
Expected 3c0778a7b5f72d3c23a3135c7d67b9f4
Computed 3c0778a7b5f72d3c23a3135c7d67b9f4
Result: OK
Byte offset: 1024
Expected f34369890fcf16fb517dcaae4463b2dd
Computed f34369890fcf16fb517dcaae4463b2dd
Result: OK
Byte offset: 1040
Expected 02f31c81e8200731b899b028e791bfa7
Computed 02f31c81e8200731b899b028e791bfa7
Result: OK
Byte offset: 2048
Expected 72da646283228c14300853701795616f
Computed 72da646283228c14300853701795616f
Result: OK
Byte offset: 2064
Expected 4e0a8c6f7934a788e2265e81d6d0c8f4
Computed 4e0a8c6f7934a788e2265e81d6d0c8f4
Result: OK
Byte offset: 3072
Expected 438dd5eafea0111b6f36b4b938da2a68
Computed 438dd5eafea0111b6f36b4b938da2a68
Result: OK
Byte offset: 3088
Expected 5f6bfc73815874d97100f086979357d8
Computed 5f6bfc73815874d97100f086979357d8
Result: OK
DECIPHERING Checking deciphered text with input plaintext: OK

XDiceLock for Apple Mac OS X C++ source code used in this test:

XDiceLock for Apple Mac OS X


So, DiceLock cipher test and analysis can go on …

DiceLock is a trademark or registered trademark of his owner where applies. DiceLock research is the research to implement Self-corrector randomisation-encryption and method, european patent EP1182777 granted 08/21/2003 and US patent US7508945 granted 03/24/2009.

Leave a Reply