Dilara KocA blog about my projects in IT security and automation.https://www.dilarakoc.com/How Much Is an AI Watermark Worth? Part 1: Building Onehttps://www.dilarakoc.com/blog/ai-watermark-part-1/https://www.dilarakoc.com/blog/ai-watermark-part-1/The first part of a series on AI text watermarks: building the core of a green-list watermark from scratch, and a detector that finds it again.Thu, 01 Oct 2026 00:00:00 GMTCaesar Cipher: Letting Statistics Find the Plaintexthttps://www.dilarakoc.com/blog/caesar-cipher/https://www.dilarakoc.com/blog/caesar-cipher/Breaking the Caesar cipher by trying all 26 keys, and letting letter statistics decide which of the 26 results is the real message.Sat, 26 Sep 2026 00:00:00 GMTMini SOC: Code Finds Password Attacks, a Local LLM Judgeshttps://www.dilarakoc.com/blog/mini-soc/https://www.dilarakoc.com/blog/mini-soc/Finding password attacks in Windows security logs, rating how serious each one is, and letting a local language model explain what to do next.Fri, 25 Sep 2026 00:00:00 GMTVigenère Cipher: Caesar With a Keywordhttps://www.dilarakoc.com/blog/vigenere-cipher/https://www.dilarakoc.com/blog/vigenere-cipher/Adding the Vigenère cipher to my cipher tool: how a repeating keyword hides letter frequencies, and how the repetition can be used to break it.Tue, 29 Sep 2026 00:00:00 GMT