Is it possible to check if RSA data is decoded correctly?

Question

Cryptography

In general, there is a pair of rsa Public / Private keys, there is a data block encrypted with a public key.
The essence of the question: is it possible to check whether the data block was decrypted correctly (validate) or the block was encrypted using another public key not related to the private key?

Answer 1

If you don't know what the decrypted result should look like, then no. There is no such possibility in the algorithm itself.