![]() ![]() It’s called symmetric because the key works on both sides – encryption and decryption. What the encrypted data looks like is dependent on the key.įor data that only you will access, symmetric keys work best. While a password gets you into something, an encryption key is also part of the process of encrypting and decrypting data. The number refers to how many bits make up the key or the length of the key. You’ll often see them referred to as 128-bit or 256-bit keys, a number evenly divisible by 8. The difference is that encryption keys are often very long and random. Think of an encryption key as an advanced sort of password. What you might not know is the different methods, or algorithms, used to encrypt data. You know that encryption means making data unreadable unless you have the key.
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