不好意思，我不能翻译波兰语。

Cryptography is the study of secure communication techniques that only allow the sender and intended recipient of a message to know its content. The term comes from the Greek word kryptos which means hidden. It is closely related to encryption, which is the act of encoding plain text into so-called cipher and then return to it after receiving it. In addition, cryptography also involves encrypting information in images using techniques such as microdots or merging. The ancient Egyptians were known to use these methods in complex hieroglyphs, and the Roman emperor Julius Caesar is credited with using one of the first modern ciphers.

In the transmission of electronic data, the most common use of cryptography is to encrypt and decrypt e-mail and other text messages. The simplest method uses a symmetric or "secret key" system. Here, the data is encrypted using a secret key and then both the encrypted message and the secret key are sent to the recipient for decryption. What's the problem? If the message is intercepted, the third party has everything they need to decrypt and read the message. To solve this problem, cryptologists developed an asymmetric or "public key" system. In this case, each user has two keys: one public and one private. Senders request the public key from the intended recipient, encrypt the message, and send it along with it. When the message arrives, only the recipient's private key will be decoded - which means that theft is impossible.