What does 128 bit encryption mean
What Do 128 Bit and 256 Bit Mean in Encryption? As we discussed earlier, when talking about 128 bit vs 256 bit encryption, the numbers 128 and 256 represent the encryption key length. It means that your data is encrypted (locked) and decrypted (unlocked) using a key of 128 or 256 bits. (Note: Every bit represents a binary digit, either 1 or 0.)