What command will generate a private RSA key without a passphrase?

What command will generate a private RSA key without a passphrase?

• A. openssl genrsa des3 out privkey.pem 2048
• B. openssl genrsa out privkey.pem 2048
• C. openssl genrsa nopass out privkey.pem 2048
• D. openssl genrsa -nopass out privkey.pem 2048

Answer: (B)

The command that correctly generates a private RSA key without a passphrase is the one that uses the `-out` flag followed by the file name and specifies the key size, but does not include any encryption options. In this case, when you use `openssl genrsa out privkey.pem 2048`, you are instructing OpenSSL to generate an RSA private key of 2048 bits and save it directly to the specified output file, `privkey.pem`. By omitting any passphrase-related options, the key generated will not be protected by a passphrase, allowing straightforward access to the private key without additional password prompts. The other options incorporate elements that either specify encryption (like `des3`), include incorrect syntax (like `nopass`), or have misplaced arguments which would not yield the desired result of generating a key without a passphrase. Thus, the straightforward format provided in the correct choice effectively achieves the goal of generating a non-encrypted RSA private key.

The command that correctly generates a private RSA key without a passphrase is the one that uses the -out flag followed by the file name and specifies the key size, but does not include any encryption options.

In this case, when you use openssl genrsa out privkey.pem 2048, you are instructing OpenSSL to generate an RSA private key of 2048 bits and save it directly to the specified output file, privkey.pem. By omitting any passphrase-related options, the key generated will not be protected by a passphrase, allowing straightforward access to the private key without additional password prompts.

The other options incorporate elements that either specify encryption (like des3), include incorrect syntax (like nopass), or have misplaced arguments which would not yield the desired result of generating a key without a passphrase. Thus, the straightforward format provided in the correct choice effectively achieves the goal of generating a non-encrypted RSA private key.