Chapter 6 of the Handbook of Applied Cryptography by Alfred J. Menezes, Paul C. van Oorschot, and Scott A. Vanstone Highlights by James Pate Williams, Jr. BA, BS, MSwE, PhD

In my opinion the key section of Chapter 6 of the Handbook is 6.4.1 that covers the SEAL (Software-optimized Encryption Algorithm) stream cipher. My original C implementation of SEAL was probably created in period 1996 to 1998. In February 2017, I created a C# implementation of the algorithm. Below is the output from the SEAL test.

SEAL Test

For clarity I reproduce the numbers above text box in the text area that follows:

0x5021758d 0xce577c11 0xfa5bd5dd 0x366d1b93 0x182cff72 0xac06d7c6 
0x2683ead8 0xfabe3573 0x82a10c96 0x48c483bd 0xca92285c 0x71fe84c0 
0xbd76b700 0x6fdcc20c 0x8dada151 0x4506dd64

0x92b404e5 0x56588ced 0x6c1acd4e 0xbf053f68 0x09f73a93 0xcd5f176a 
0xb863f14e 0x2b014a2f 0x4407e646 0x38665610 0x222d2f91 0x4d941a21 
0x3af3a4bf 0x021e4080 0x2a677d95 0x405c7db0 0x338e4b1e 0x19ccf158

0x907c1e3d 0xce71ef0a 0x48f559ef 0x2b7ab8bc 0x4557f4b8 0x033e9b05 
0x4fde0efa 0x1a845f94 0x38512c3b 0xd4b44591 0x53765dce 0x469efa02 
0xbd7dea87 0xfd036d87 0x53aa3013 0xec60e282 0x1eaef8f9 0x0b5a0949

0x37a00595 0x9b84c49c 0xa4be1e05 0x0673530f 0x0ac8389d 0xc5878ec8 
0xda6666d0 0x6da71328 0x1419bdf2 0xd258bebb 0xb6a42a4d 0x8a311a72 
0x547dfde9 0x668d50b5 0xba9e2567 0x413403c5 0x43120b5a 0xecf9d062

0x098045fc

The preceding numbers reproduce the 6.70 Example on pages 215-216 of the Handbook. The first block of hex digits is the R table. The second set of hex digits is the T table. The third set of hex digits is the word S[0], S[1], …, S[255]. The penultimate set of hex digits is  the part of the 1024 words of the y output vector. The last hex encoded number is the XOR of the 1024 y output vector numbers.

 

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Author: jamespatewilliamsjr

My whole legal name is James Pate Williams, Jr. I was born in LaGrange, Georgia approximately 70 years ago. I barely graduated from LaGrange High School with low marks in June 1971. Later in June 1979, I graduated from LaGrange College with a Bachelor of Arts in Chemistry with a little over a 3 out 4 Grade Point Average (GPA). In the Spring Quarter of 1978, I taught myself how to program a Texas Instruments desktop programmable calculator and in the Summer Quarter of 1978 I taught myself Dayton BASIC (Beginner's All-purpose Symbolic Instruction Code) on LaGrange College's Data General Eclipse minicomputer. I took courses in BASIC in the Fall Quarter of 1978 and FORTRAN IV (Formula Translator IV) in the Winter Quarter of 1979. Professor Kenneth Cooper, a genius poly-scientist taught me a course in the Intel 8085 microprocessor architecture and assembly and machine language. We would hand assemble our programs and insert the resulting machine code into our crude wooden box computer which was designed and built by Professor Cooper. From 1990 to 1994 I earned a Bachelor of Science in Computer Science from LaGrange College. I had a 4 out of 4 GPA in the period 1990 to 1994. I took courses in C, COBOL, and Pascal during my BS work. After graduating from LaGrange College a second time in May 1994, I taught myself C++. In December 1995, I started using the Internet and taught myself client-server programming. I created a website in 1997 which had C and C# implementations of algorithms from the "Handbook of Applied Cryptography" by Alfred J. Menezes, et. al., and some other cryptography and number theory textbooks and treatises.

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