Does encryption guarantee integrity?

Question

To build a secure system, can we assume that encryption guarantees integrity is true before starting a secure programming?

• Both in symmetric and public-key encrypt

Answer 1

If data integrity is a specific concern to you, you should use a cryptographic hash function, combined with an an encryption algorithm.

But it really does come down to using the correct tool for the job. Some encryption algorithms may provide some level of checksum validation built-in, others may not.