Rsa Encryption Solution - Applied Cryptography

Decrypting Ciphertext

In this section, the speaker explains how to decrypt a ciphertext using the RSA encryption algorithm.

Decryption Process

• To decrypt a ciphertext, we need to raise it to the power of d mod n.

• For example, if we have a ciphertext of 903 and want to decrypt it, we can take it to the d power mod n and get 387.

• We can verify our answer by checking that raising 387 to the power of e mod n gives us back the original message.

Conclusion

• Decrypting a ciphertext involves raising it to the power of d mod n.

• We can use Python code to perform these calculations and verify our answers.