AES ADVANCED ENCRYPTION STANDARDS ALGORITHM || EXPLAINED IN TELUGU #AES #telugu#cryptography#cns#

CNS6 || AES ADVANCED ENCRYPTION STANDARDS ALGORITHM || EXPLAINED IN TELUGU #AES ALGORITHM The Advanced Encryption Standard (AES) is a widely used symmetric key block cipher algorithm in cryptography. It is the successor of the DES algorithm and provides much stronger security. ✔️ Developed by: NIST (National Institute of Standards and Technology) in 2001 ✔️ Type: Symmetric encryption (same key is used for encryption and decryption) ✔️ Block size: 128 bits ✔️ Key sizes: 128, 192, or 256 bits ✔️ Rounds: 10 rounds for 128-bit key 12 rounds for 192-bit key 14 rounds for 256-bit key 🔑 Steps in AES Algorithm 1. Key Expansion – Generate round keys from the cipher key. 2. Initial Round – AddRoundKey (XOR with the key). 3. Main Rounds (repeated 9/11/13 times depending on key size): SubBytes (Byte substitution using S-box) ShiftRows (Rows shifted cyclically) MixColumns (Mixing of columns for diffusion) AddRoundKey (XOR with round key) 4. Final Round (without MixColumns): SubBytes → ShiftRows → AddRoundKey ⚡ Advantages Strong security compared to DES and 3DES Fast and efficient for both hardware and software Used in SSL, VPN, wireless networks, and secure file transfer 🚫 Limitations Symmetric: Both sender and receiver must share the same secret key Key distribution is difficult in large networks