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One-time password - Wikipedia, the free encyclopedia |
 | | On these OTP systems time is an important part of the password algorithm, hence the generation of new passwords based on the current time rather than the previous password or a secret key. |
| | Doing so on an OTP system that is not time-synchronized will cause the client to not be synchronized with the authentication server; the result of this is the added expense of re-issuing new clients. |
| | Mathematical algorithm type OTPs are a good substitute though, especially since many security specialist frown upon the principle Security through obscurity which is often used for the time-synchronized one-time passwords, while the other two types of one-time passwords can and often do rely on cryptographic algorithms that are commonly accepted as secure. |
| en.wikipedia.org /wiki/One-time_password (955 words) |
