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XOR, often written ⊕, is one of the basic operations on bits and bit-sequences. It is a building block of many cryptographic primitives (and some higher-level algorithms, like modes of operations).

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Is it safe to use XOR to encrypt data key using master key

If done right, XOR can be used to encrypt data. … One way to do this, is to generate a pseudo-random key-stream using your master key and XOR the key-stream, which needs to be as long as the data, with the data. …
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