Encryption is the encoding of a message so that only the intended addressee can decode it. Encryption software turns your message into an indecipherable sequence called ciphertext. Even if someone gets hold of your message, they won’t be able to access the encrypted data unless they have the key. Military-grade encryption is virtually impossible to crack as it uses 256-bit keys that generate 2^256 possible combinations. There are no supercomputers yet that can crack such a key within a reasonable amount of time.