When a strong-named assembly is created, it contains the simple text name of the assembly, the version number, optional culture information, a digital signature, and the public key that corresponds to the private key used for signing. Strong-named assemblies can be installed in the Global Assembly Cache, which is required to enable some scenarios. You want to enable your assemblies to be referenced by strong-named assemblies, or you want to give friend access to your assemblies from other strong-named assemblies. Why strong-name your assemblies? When you reference a strong-named assembly, you can expect certain benefits, such as versioning and naming protection. They provide a unique identity only.
For more information, see How to: Sign an Assembly with a Strong Name or Sn. If this option is not specified, Sign Tool adds the specified catalogs to the catalog database. Sign Tool will find all valid certificates that satisfy all specified conditions and select the one that is valid for the longest time. Warning Do not rely on strong names for security. This requires strong-naming because a domain-neutral assembly must be installed in the global assembly cache. The following table lists the options that can be used with the catdb command. This means you need different versions of an assembly to load side by side in the same app domain without conflict. The SHA1 hash is commonly specified when multiple certificates satisfy the criteria specified by the remaining switches. You do not want to negatively affect performance of apps using your assembly, so you want the assembly to be domain neutral. If this option is not specified, the My store is opened. When you want to centralize servicing for your app by applying publisher policy, which means the assembly must be installed in the global assembly cache. What makes a strong-named assembly? Assemblies that have the same strong name should be identical. The default usage is "Code Signing" 1. If this option is not specified, Sign Tool overwrites any existing catalog that has the same name as the catalog being added. If this option is not present, Sign Tool expects to find only one valid signing certificate. You want to enable your assemblies to be referenced by strong-named assemblies, or you want to give friend access to your assemblies from other strong-named assemblies. They provide a unique identity only. This option is ignored for non-PE files. For example, if different extensions of an API exist in assemblies that have the same simple name, strong-naming provides a unique identity for each version of the assembly. Strong-named assemblies can be installed in the Global Assembly Cache, which is required to enable some scenarios. If no primary signature is present, this signature is made the primary signature instead. This value can be a substring of the entire subject name. Strong-named assemblies are useful in the following scenarios:
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