Ответ:
- Абстрактный метод – метод без реализации, который должен быть переопределен в наследнике.
- Интерфейс – чистая абстракция (до Java 8), содержит только абстрактные методы (начиная с Java 8, допускает default и static методы).
tags: #собеседование
BY JavaRocks
Telegram’s stand out feature is its encryption scheme that keeps messages and media secure in transit. The scheme is known as MTProto and is based on 256-bit AES encryption, RSA encryption, and Diffie-Hellman key exchange. The result of this complicated and technical-sounding jargon? A messaging service that claims to keep your data safe.Why do we say claims? When dealing with security, you always want to leave room for scrutiny, and a few cryptography experts have criticized the system. Overall, any level of encryption is better than none, but a level of discretion should always be observed with any online connected system, even Telegram.
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