Kahani: Ali ne Sara ko chit bheji: "Chhutti ke baad canteen pe milna." Lekin raaste mein Bilal ne chit parh li! 😮
Aaj hum Ali ki madad karenge, taa ke us ka raaz sirf Sara hi parh sake.
Cryptography
Raaz chhupane aur pakarne ka science. 5 missions poore karo, stars jamaa karo, aur Crypto Champion bano!
Mission 1
Code Machine
Encryption = message ko lock karna. Decryption = lock kholna. Har letter ko alphabet mein aage khiskao. Kitne qadam? Yeh hai aap ki key!
Key:+1
Secret message (Bilal yeh dekhega 😵)
Is code ko Caesar Cipher kehte hain. 2000 saal pehle Julius Caesar apne fauji messages aise hi chhupata tha.
🕵️ Decode challenges (har ek = ⭐)
Mission 2
Do Chaabiyan: Public aur Private Key
Mission 1 mein ek hi key thi (Symmetric). Masla: agar Bilal key bhi chura le to sab khatam! Is ka hal hai do chaabiyan (Asymmetric), bilkul ghar ke letterbox ki tarah:
📮 Public Key = letterbox ka moonh. Koi bhi chitthi daal sakta hai.
🔑 Private Key = letterbox ki chaabi. Sirf Sara ke paas.
✉️
Sara ka
Letterbox
Letterbox
Mission 3
Hash Juicer 🥭
Juicer mein aam daalo to mango shake ban jata hai. Kya shake se aam wapas ban sakta hai? Nahi! Hashing bhi aisa hi ek-taraf ka code hai. Har data ka apna fingerprint hota hai.
Sirf ek capital letter se poora fingerprint badal gaya! Isi liye bank aap ki ATM PIN seedhi nahi rakhta, sirf us ka hash rakhta hai.
🔍 Asli file pehchano (⭐)
Teacher ne asli report card ka hash save kiya tha:
Mission 4
Lock 🔒 ka Sach
Browser mein https aur 🔒 ka matlab hai ke aap aur website ke beech ka raasta encrypted hai. Lekin yeh nahi batata ke website sachi hai! Dhokebaz websites bhi lock laga leti hain.
Har address dekho aur batao: bharosa karein? (har sahi jawab = ⭐)
Mission 5