One-way function

cryptography, mathematics
A function which is easy to compute but whose inverse is very difficult to compute. Such functions have important applications in cryptography, specifically in public-key cryptography.
See also: trapdoor function.


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  • One-way hash function

    algorithm (Or “message digest function”) A one-way function which takes a variable-length message and produces a fixed-length hash. Given the hash it is computationally infeasible to find a message with that hash; in fact one can’t determine any usable information about a message with that hash, not even a single bit. For some one-way hash […]

  • One-way mirror

    noun 1. a sheet of glass that can be seen through from one side and is a mirror on the other, used especially for observation of criminal suspects by law-enforcement officials or witnesses.

  • One way or another

    Also, one way or the other. Somehow, in some fashion, as in One way or another I’m sure we’ll meet again, or He wasn’t sure how to go about building a wall, but he was sure he would manage in one way or the other. [ Mid-1500s ]

  • One-way street

    Related Terms not a one-way street

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