Description: At present, the most widely used method of software protection, we can be divided into two categories: dependent on the protection of hardware and do not rely on hardware copy protection program. Rely on hardware protection programs include: a floppy disk protection, encryption card protection, software protection lock (commonly known as dongle ), as well as CD-ROM, such as encryption, a common feature of these programs is that protective measures should be involved in a specific hardware to achieve, involving The hardware may be the software disk, U disk, CD-ROMs or other external equipment
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