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Mike's public key is used. When encrypting a message utilizing an asymmetric encryption algorithm, the individual performing the encryption does so using the recipient's public key.
What is Encryption?
Encryption exists as a method of scrambling data so that only authorized parties can understand the information. In technical terms, it stands for the process of converting human-readable plaintext to incomprehensible text, also understood as ciphertext.
In cryptography, encryption exists as the process of encoding information. This process transforms the original representation of the information, understood as plaintext, into an alternative form known as ciphertext. Ideally, only authorized parties can decipher a ciphertext back to plaintext and access the original data.
Encryption improves the security of a message or file by scrambling the content. To encrypt a message, you require the right key, and you need the right key to decrypt it as well. It stands as the most effective way to hide communication through encoded information where the sender and the recipient hold the key to deciphering data.
Symmetric-key algorithms exist algorithms for cryptography that utilize the same cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to proceed between the two keys.
Hence, Mike's public key is used. When encrypting a message utilizing an asymmetric encryption algorithm, the individual performing the encryption does so using the recipient's public key.
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