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Security Education Companion
A free resource for digital security educators


To apply encryption technology to any sort of information or communication. This transforms the information or communication mathematically so that it seems meaningless, but can still be restored to its original form by a person or device that possesses the right secret key. This limits who can access the information because without the right secret key, it should be impossible to reverse the encryption and recover the original information. Encryption is one of several technologies that make up the field called cryptography.