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4 votes
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Can the RSA public key be used for both encryption and decryption?

The standard convention in asymmetric cryptography (thus RSA), is that key generation generates a key pair comprising a public key and a private key, and unless otherwise stated the public key is ...
fgrieu's user avatar
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2 votes

Why do we need more security than the private key distribution?

You never, never, ever send a private key. A private key should be generated by your device. And then it should stay on your device forever and never leave it. You use the private key to create as ...
gnasher729's user avatar
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2 votes
Accepted

Why do we need more security than the private key distribution?

If we can send a key to just one person and others cannot see it, then why should I think about more security? Indeed, if we can safely distribute a private key, than we do not need more security (in ...
fgrieu's user avatar
  • 142k
2 votes

Why do we need more security than the private key distribution?

In cryptography, most of the times we care about public key cryptography. Having a private key distribution is something unachievable in most cases. Indeed, as you said, if we had private key ...
Alex Them's user avatar
  • 322
1 vote

"Appendable" encryption scheme

This is a function of stream ciphers that are not plaintext aware - which is usually the case. These ciphers have a random access property which allows you to encrypt / decrypt any byte in the stream. ...
Maarten Bodewes's user avatar
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