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Internet users need to be able to transfer private data online, like credit card numbers and social security numbers.
Why can Internet users be sure that cryptographic algorithms protecting this information are secure?
The algorithms used for cryptography are based on intractable problems, making them extremely difficult to break.
The algorithms used for cryptography have been used for such a long time that we know they are very secure.
The algorithms used for cryptography are solvable, but the solutions are kept under a secure government protection service.
We cannot be sure that the algorithms are secure.