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I have a X509 certificate that I would like to use to encrypt/decrypt password. However, I can only use AES-256 algorithm.
Everything I have found on the internet suggests to use RSACryptoServiceProvider, but that does not do AES-256 encryption.
I don't know a lot about encryption so some basic code examples would help a lot.
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Right-click (or press and hold) a file or folder and select Properties. Select the Advanced button and select the Encrypt contents to secure data check box. Select OK to close the Advanced Attributes window, select Apply, and then select OK.
Decryption is possible with a text-based log containing encryption key data captured when the pcap was originally recorded. With this key log file, we can decrypt HTTPS activity in a pcap and review its contents.
AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data.
RSA is a asymmtric-key algorithm. The key in the public certificate is used for encrypting. A private key is then used for decrypting.
RSA cryptographic operations are time consuming. Normal practice is to generate a random AES key, encrypt the key with RSA and then encrypt the plain text with AES.
See how to use RSA to encrypt files (huge data) in C#
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