Final answer:
Encryption needs a key and an encryption algorithm to secure data. Additional security measures like two-factor authentication and education on avoiding scams further protect against unauthorized access.
Step-by-step explanation:
Encryption is a vital security measure that is used to protect data. It typically requires two key components: a key and an encryption algorithm. The key is a secret parameter that is used to encrypt and decrypt the message, and the encryption algorithm is a set of mathematical operations that transforms plain text into ciphertext and vice versa. Without a key and a suitable algorithm, encryption cannot be performed.
In addition to these core components, further measures like two-factor authentication, the use of stronger passwords, and education on avoiding scams can increase security for individuals. On the other hand, companies and governments should implement stronger protections on their websites to safeguard sensitive information against unauthorized access.