I enjoyed your Public Key Cryptography video; the color-mix metaphor is a great one I have not heard before. I write to provide feedback on one element of the explanation that I felt was unclear. At roughly 4’30”, the script reads: “Alice takes Bob’s public result (16) and raises it to the power of her private number (54), which gives 3 to the power of 54 x 24”. Except one quickly realizes that 16^54 does not give 3^(54*24). While it is true that 16^54 mod 17 is congruent to 3^(54*24) mod 17 (the ultimate desired result), I found the wording of the script at this point of the explanation to be confusing. I suspect there is a clearer way of illuminating this key aspect of the process, though I humbly confess I do not have one to offer.

Thank you for your inspired effort, and keep up the excellent work.

Thanks for this video. Like other modern technologies, most people use this stuff every day with no idea how it works (on no appreciation of the internal beautry)

March 1, 2012 at 8:35 pm

Hello Brit,

I enjoyed your Public Key Cryptography video; the color-mix metaphor is a great one I have not heard before. I write to provide feedback on one element of the explanation that I felt was unclear. At roughly 4’30”, the script reads: “Alice takes Bob’s public result (16) and raises it to the power of her private number (54), which gives 3 to the power of 54 x 24”. Except one quickly realizes that 16^54 does not give 3^(54*24). While it is true that 16^54 mod 17 is congruent to 3^(54*24) mod 17 (the ultimate desired result), I found the wording of the script at this point of the explanation to be confusing. I suspect there is a clearer way of illuminating this key aspect of the process, though I humbly confess I do not have one to offer.

Thank you for your inspired effort, and keep up the excellent work.

~Alan

March 2, 2012 at 3:06 am

Thank you very much for your feedback Alan, I appreciate it! I will take this into consideration when putting together the final chapter

April 13, 2012 at 11:32 am

Thanks for this video. Like other modern technologies, most people use this stuff every day with no idea how it works (on no appreciation of the internal beautry)