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What is jarsigner?

The jarsigner tool fulfills two primary roles: it authenticates signatures and checks the integrity of signed JAR files, while also allowing users to sign Java Archive (JAR) files. A digital signature is a sequence of bits that originates from the data being signed and is combined with the private key of a particular signer, which could be a person or an organization, among others. Similar to a traditional handwritten signature, a digital signature offers several advantageous attributes; its validity can be verified through a calculation that utilizes the public key associated with the private key that created the signature. In addition, it is closely linked to the data that is signed, meaning that it cannot accurately represent a signature for any different data, and any modifications to the signed data result in the signature being deemed invalid. This system guarantees that it cannot be forged, as long as the private key is kept secure, thereby significantly boosting security in digital communications and transactions. Overall, the jarsigner utility is essential for maintaining trust and ensuring the authenticity of Java applications.

What is apksigner?

The apksigner tool, part of the Android SDK Build Tools starting from version 24.0.3, allows for the signing of APK files while guaranteeing the validity of their signatures across all compatible Android platform versions. This document serves as a concise introduction to using the utility and outlines the various command-line options available. For an in-depth understanding of the apksigner tool related to APK signing, users should consult the detailed documentation. The tool's reliance on a minimum Android framework API level for signature verification is adjustable; opting for higher values can bolster security measures during the signing process, although this may limit the APK's usability on older devices. By default, the utility uses the minSdkVersion attribute from the application’s manifest file to ascertain its basic compatibility. It is advisable for users to weigh both security enhancements and device compatibility when determining the appropriate API level for their APKs. Furthermore, understanding the implications of these settings is crucial for developers aiming to maintain a broad user base while ensuring secure application distribution.

Media

Media

Integrations Supported

Additional information not provided

Integrations Supported

Additional information not provided

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Oracle

Date Founded

1977

Company Location

United States

Company Website

docs.oracle.com/javase/7/docs/technotes/tools/windows/jarsigner.html

Company Facts

Organization Name

Google

Date Founded

1998

Company Location

United States

Company Website

developer.android.com/tools/apksigner

Categories and Features

Categories and Features

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