Yes, that's a general principle in cryptography. It describes the ideal characteristics of a secure encryption algorithm. Let's break this down:
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Ease of Encryption: A good encryption should allow the encryption process to be efficient, straightforward, and fast. This is important for practical use, as users often need to encrypt large amounts of data quickly and without significant computational overhead.
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Difficulty of Decryption: A strong encryption method should make it extremely difficult for anyone without the correct key to decrypt the information. Even with access to the encrypted data, an attacker should not be able to recover the plaintext without considerable effort, time, or resources. This ensures that even if the encrypted data falls into the wrong hands, it remains secure.
This principle is often encapsulated in the idea of security based on mathematical foundations. Good encryption algorithms should leverage complex mathematical problems (such as factoring large prime numbers or solving discrete logarithms) that are computationally hard to solve.
In modern cryptography, various techniques and algorithms (such as AES, RSA, and ECC) are designed with these principles in mind, ensuring both usability and security in protecting sensitive data.