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When Rijndael was chosen as AES, it was ~3 years old and was broken for 6-7 rounds out of 10 with 128 bit keys, and 7-8 rounds out of 14 ...

When Rijndael was chosen as AES, it was ~3 years old and was broken for 6-7 rounds out of 10 with 128 bit keys, and 7-8 rounds out of 14 with 256 bit keys. Chacha20 is 7 years old now and is broken for 7 rounds out of 20, with the attacks on BLAKE/BLAKE2 holding up that margin. You should be very comfortable with Chacha20!

Posted by floody-berry on Feb 24, 2015, 5:02 AM

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When Rijndael was chosen as AES, it was ~3 years old and was broken for 6-7 rounds out of 10 with 128 bit keys, and 7-8 rounds out of 14 ...

floody-berryFeb 24, 2015, 5:02 AM

When Rijndael was chosen as AES, it was ~3 years old and was broken for 6-7 rounds out of 10 with 128 bit keys, and 7-8 rounds out of 14 with 256 bit keys. Chacha20 is 7 years old now and is broken for 7 rounds out of 20, with the attacks on BLAKE/BLAKE2 holding up that margin. You should be very comfortable with Chacha20!

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