This refers to a tool or process that applies a digital signature to an iOS application archive (IPA) file. The signature verifies the application’s authenticity and confirms that it has not been tampered with since it was signed. For instance, developers use this when distributing applications outside of the official App Store, or when testing on devices before App Store submission.
It is critical for ensuring the security and integrity of iOS applications. By verifying the source and preventing unauthorized modifications, it helps maintain user trust and protects against malware distribution. Historically, this process was primarily used by enterprise developers and for internal testing, but its importance has grown with the increasing interest in distributing applications through alternative channels.