The openssl dgst command can alse be used by RSA and ECDSA key. So DSA is only used for signing in engineering. So there is no such encryption command in OpenSSL. But there is no such standard for encryption by DSA in engineering. This algorithm is take form the book 《Understanding Cryptography》 2.2. Bob can decrypt the message $x \equiv y \cdot K_M^ \pmod p$ Alice encrypt the message $x \in Z_p^* $, $y \equiv x \cdot K_M \pmod p$ģ. Since the number $K_M$ is negotiated by the two sides(Alice and Bob), they both know the number.Ģ. (Just by the number itself, not by DES or AES.)įor example, this is one of the ways to encrypt using the negotiated number.ġ. So a number can be negotiated by the DSA parameters, and we can use this number to encrypt. The DSA algorithm can theoretically be used for encryption according to its mathematical properties because DSA is based on the discrete algorithm, and it can be used for Diffie–Hellman key exchange. But the DSA algorithm is different from RSA. Openssl rsautl -inkey rsa_pri_2048.key -decrypt -in example_encrypt.binĢ. Decryption by rsa_pri_2048.key rsa_pri_2048.key : Openssl rsautl -inkey rsa_pub_2048.pub -pubin -in example.txt -encrypt >example_encrypt.binġ.3.3. Encryption by public key rsa_pub_2048.pub The content of the file example.txtġ.2.2. This is the encryption procedure by OpenSSLġ.1.1. If encrypted by the public key, and decrypted by secret key, this is called encryption. There is RSA encrytion command openssl rsautl in OpenSSL. The RSA algorithm can be used for encryption.
I will try to answer this question with the help of OpenSSL commands and add some explanations to them.
To reduce misunderstandings, I modified it, just talking about the very question and the encryption.
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