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Ansoft Designer / Ansys Designer 在线帮助文档：

Using Component Libraries >
Encrypted Libraries  >
   Creating and Managing Encrypted Libraries       

Creating and Managing Encrypted Libraries

Designer lets you create encrypted password-protected files (typically in SPICE format) that may be added to the design via .lib or .inc statements. Access the encryption tools through the Password Manager dialog box on the Tools main menu.

Password Assignment Types

An encrypted file may be assigned a choice of password types:

1. A user-defined password set — When you define your own password for a library, you are actually required to define two passwords: one for Full Access permissions and one for Execute Only permissions. With Full Access permissions, a user may access the encrypted library to simulate, see, and edit its contents. With Execute Only permissions, the user may add components and simulate, but not see or edit the contents.

2. The Ansoft Password — The Ansoft password is a generic, hard-coded execute-only password shared across all Ansoft tools. Any Ansoft tool may read any applicable file encrypted in any other Ansoft tool using the Ansoft password. The Ansoft password is the easiest way to share encrypted libraries among Ansoft applications when they are not expected to be viewed or edited.

3. A password that is already known to the current session — you can assign an encrypted library to use a password that is already known to the current Designer session so you can synchronize passwords across multiple libraries

NOTES

1. For security reasons, passwords are not saved between sessions and must be re-entered each time Designer is started. Passwords are available after a given project is closed and another is opened.

2. Ansoft Designer and Nexxim use the Advanced Encryption Standard (AES) to encrypt libraries and models. Ansoft Designer and Nexxim use a 128 bit block cipher with a 256 bit key.

3. You can encrypt selected parts of a file by enclosing them within a protected “block”, as in the following. You can set up multiple .protect/.unprotect blocks in the same file, but you cannot nest them.

.protect

This block will be encrypted.

.unprotect

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