Horst Feistel created the most elegant way to do encryption. Thanks for the video. I would like to know if you will approach Thorp Shuffle(Feistel network unbalanced) in the future?
Hiho, the next videos (about modern ciphers/cryptography) that I want to make are probably about AES, and then some hash functions (MD5, SHA-1, SHA-256). Also, I will have a look at more modern techniques in the future, but since this is not my main expertise I have to first get more knowledge about such topics :-)
Thank you for this video - great explanation! Only one thing I noticed: Around 8:35 you are showing the structure of the DES rounds. In the last round you are applying the feistel function + XOR again to L_16 and R_16. I had a look at the specification and could not find this last operation. Did I miss something here?
Hello L.W., Yes, you are right. In the last step of the figure, it should have been L_15 and R_15. And the results are L_16 and R_16. Good catch. Funnily, I implemented DES before creation of the video :-) but obviously added the wrong indices at the end. In the end is also no crossover of left and right. That is shown correctly. Greetings, Nils
Hiho, Yes you are right. The input key size of DES is 64 bit. But only 56 bit are used as actual key material. The remaining "unused" 8 bits are used as parity bits. So every 8th bit is a paritiy bit. Greetings, Nils
Hello Afifah Muthmainnah, If you want to encrypt text (and a URL is also just text, I suppose :-)) you can try encrypting it as described in this video here: ruclips.net/video/Ie7yg1okghk/видео.html In the video, I use AES for encrypting text, but you could just exchange the AES component with a DES component. Nevertheless, I would suggest using AES since its the current encryption standard and DES is outdated. Hope that helps and answers your question, Greetings, Nils
what is the difference between encrpting endpoint URL using the AES algorithm and the Rijndael algorithm? where can we find the rijndael algorithm in cryptool?
Horst Feistel created the most elegant way to do encryption. Thanks for the video. I would like to know if you will approach Thorp Shuffle(Feistel network unbalanced) in the future?
Hiho, the next videos (about modern ciphers/cryptography) that I want to make are probably about AES, and then some hash functions (MD5, SHA-1, SHA-256). Also, I will have a look at more modern techniques in the future, but since this is not my main expertise I have to first get more knowledge about such topics :-)
Thank you for this video - great explanation! Only one thing I noticed: Around 8:35 you are showing the structure of the DES rounds. In the last round you are applying the feistel function + XOR again to L_16 and R_16. I had a look at the specification and could not find this last operation. Did I miss something here?
Hello L.W.,
Yes, you are right. In the last step of the figure, it should have been L_15 and R_15. And the results are L_16 and R_16. Good catch.
Funnily, I implemented DES before creation of the video :-) but obviously added the wrong indices at the end.
In the end is also no crossover of left and right. That is shown correctly.
Greetings,
Nils
In video at (16:39 slide 6) I think the initial key is size of 64 bit and the size of Permuted Choice 1 should be 56-bits
Hiho,
Yes you are right.
The input key size of DES is 64 bit. But only 56 bit are used as actual key material. The remaining "unused" 8 bits are used as parity bits. So every 8th bit is a paritiy bit.
Greetings,
Nils
hello, that's a great video! What should i do when i want to encryption URL with DES algrithm in cryptool?
Hello Afifah Muthmainnah,
If you want to encrypt text (and a URL is also just text, I suppose :-)) you can try encrypting it as described in this video here: ruclips.net/video/Ie7yg1okghk/видео.html
In the video, I use AES for encrypting text, but you could just exchange the AES component with a DES component. Nevertheless, I would suggest using AES since its the current encryption standard and DES is outdated.
Hope that helps and answers your question,
Greetings,
Nils
what is the difference between encrpting endpoint URL using the AES algorithm and the Rijndael algorithm? where can we find the rijndael algorithm in cryptool?