Reply To: Extracurricular Challenges

Also #98856,

There are some very small periodic IOC peaks for multiples of 8, far smaller than I would expect for a repeated key xor.

000 is the most common 3 bit sequence by a decent margin.

Probably coincidental, but there are 52=2*26 unique six letter sequences.

Assume average word length of 4.5 letters and sentence length of 15 words. The plaintext might therefore have 70 letters (rounding). If we include spaces, that might be 85 letters. There are 912 binary digits in the ciphertext, so that equates to 13 bits per character (without spaces) or 10 bits per character (with spaces). 8 bit ASCII with punctuation included, perhaps?