Good day, please tell me, if iphone purchased in Canada without a contract with mobile operator, will it be subject to safeguards in Russia

You have the latest iOS version installed and If you are not using modified software on the phone (jailbreak), the phone can't be hacked.

Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issu…

Sorry for the misunderstanding. The warranty for an iPhone is only valid in the country of purchase. In case you will have to get service for the phone, you will have to bring it back to the country of purchase. It can't be shipped internationally. And, depending on the country where you go, not all features might be supported by the local carrier or network.