| ⇢ | A | Calculator added | |
| ⇢ | A | Signer added | |
| ⇢ | A | Verifier added | |
| A | ↛ | Authenticator removed |
| ⇢ | A | Signer::__construct() added | |
| ⇢ | A | Signer::sign() added | |
| ⇢ | A | Signer::withSignedHeadersHeader() added | |
| ⇢ | A | Verifier::verify() added | |
| ⇢ | A | Verifier::withoutUnsignedHeaders() added | |
| ⇢ | A | Calculator::hmac() added | |
| ⇢ | A | Verifier::__construct() added | |
| B | ↛ | Authenticator::verify() removed | |
| A | ↛ | Authenticator::sign() removed | |
| A | ↛ | Authenticator::getSignedHeadersString() removed | |
| A | ↛ | Authenticator::__construct() removed | |
| A | ↛ | Authenticator::doHMACSignature() removed |