Raynanda Santoso on Instagram: "DAY 3/30: Stream Ciphers Symmetric Cryptography is divided into 2: Stream ciphers and Block Ciphers. Stream ciphers encrypt information continuously like a stream, pairing each bit of plaintext with a bit of keystream. The encryption and decryption process is as simple as adding the message / ciphertext with the keystream in modulo 2. As adding something twice in mod 2 basically reverses the operation. Is it really that simple? Yes, the main security comes from ho