Question

СРОЧНО ДАЮ 100 БАЛЛОВ Зашифруйте слово "BILBO" шифром RSA

Answer 1

Відповідь:RKwSVBbh5P9dza/wSlBBXWrR+ACGMaiTYoqlCodn0XU=

ключ:MDswDQYJKoZIhvcNAQEBBQADKgAwJwIgW/MHs0/b2fRZYs8iB1PV3vzrkYK35d1/fG5XA+1wwmECAwEAAQ==

зробив на сайті :https://torear797.github.io/PWA/?page=RSA

удачки :)

Answer 2

RSA (Rivest-Shamir-Adleman) is an asymmetric encryption algorithm that requires a public key for encryption and a corresponding private key for decryption. Since I don't have access to a specific RSA key pair, I can explain the general process of RSA encryption using an example.

1. Generate RSA Key Pair: To use RSA encryption, you need to generate a key pair consisting of a public key and a private key. The private key should be kept secret, while the public key can be shared with others.

2. Encrypting the Word "BILBO": To encrypt the word "BILBO" using RSA, we need the recipient's public key. Let's assume the public key consists of a modulus (n) and an exponent (e).

   a. Convert "BILBO" into numerical representation: Each letter in the word "BILBO" can be represented by its ASCII value. In this case: B = 66 I = 73 L = 76 B = 66 O = 79

   b. Apply the RSA encryption formula: The RSA encryption formula is: Ciphertext = (Plaintext^e) mod n

   Let's assume the public key values are: n = 187 e = 7

   Applying the formula to each letter: Ciphertext(B) = (66^7) mod 187 = 40 Ciphertext(I) = (73^7) mod 187 = 84 Ciphertext(L) = (76^7) mod 187 = 58 Ciphertext(B) = (66^7) mod 187 = 40 Ciphertext(O) = (79^7) mod 187 = 150

   c. Convert the ciphertext back into text: Each ciphertext value can be converted back into a character using ASCII decoding: Ciphertext(B) = 40 -> "(" Ciphertext(I) = 84 -> "T" Ciphertext(L) = 58 -> ":" Ciphertext(B) = 40 -> "(" Ciphertext(O) = 150 -> "ú"

   Therefore, the encrypted word "BILBO" using RSA with the given public key is "(:T(ú".

Please note that this is a simplified example using small numbers. In real-world scenarios, RSA encryption employs much larger prime numbers to ensure security. Additionally, the encryption process also includes padding and other techniques for secure communication.