delete(metadata, MetaSealedKeyS3)
	delete(metadata, MetaSealedKeyKMS)
	delete(metadata, MetaKeyID)
	delete(metadata, MetaDataEncryptionKey)
}

// IsSourceEncrypted returns true if the source is encrypted
func IsSourceEncrypted(metadata map[string]string) bool {
	if _, ok := metadata[xhttp.AmzServerSideEncryptionCustomerAlgorithm]; ok {
		return true
	}
	if _, ok := metadata[xhttp.AmzServerSideEncryption]; ok {