Fediverse

Fediverse

Spam filtering strategy (Fediverse only)

• K-Anonymity test - Estimating whether the characters has been arranged by humans. (use Have I Been Pwned)
• Not CAPTCHA - Image spam containing characters that look very similar to CAPTCHA. (use TrueCaptcha)
• VowelRatio10 - In characters arranged by humans, there is a high frequency of vowels (aeiou) and semivowels (wy) and vowel-ending patterns included in strings that are 10 characters.
• Palindrome4 - Detect palindromes composed of 4 or more characters
• KnownWords4 - Detect well-known words composed of 4 or more characters
• SearchEngine3 - In public search engine, the given string yields more than 2 results. (use LibreY)
• RepeatedNumber3 - Detect a repeated numbers 3 times or more.
• SSL decryption (MITM) when relaying to federated servers.

The strategies were implemented to respond to the Fediverse Spam Attacks which started on the 15th of February.