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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 Klarseal?

Klarseal provides code-signing certificates for developers and businesses that are involved in the distribution of Windows applications, drivers, or installers. They offer both Standard (OV) and Extended Validation (EV) certificates issued by Certum and include services for managing orders, invoices, application assessments, and real-time status updates. By employing cloud signing, these certificates ensure the private key is generated and securely housed within the certificate authority's hardware security module, rather than being stored on a USB token. The Extended Validation option requires more rigorous identity verification steps and is essential for developers who wish to create an account in the Windows Hardware Developer Program to submit kernel drivers. Furthermore, Klarseal provides free tools like Sign my app, an MIT-licensed plugin that enables compatible AI coding agents to facilitate Windows-file signing for user approval, as well as Sign my app for Windows, a utility that verifies and digitally signs .exe, .dll, and .msi files, streamlining the development process. This extensive range of tools not only makes the signing process more straightforward but also significantly boosts security and compliance for software distribution, ultimately benefiting developers and their end users. Additionally, Klarseal's commitment to improving the developer experience demonstrates their awareness of the evolving needs in software security and distribution.

Media

Media

Integrations Supported

Integrations Supported

Claude Desktop
Model Context Protocol (MCP)
SignTool

API Availability

API Availability

Pricing Information

Pricing not provided

Pricing Information

€159/year
Standard (OV) starts at €159 for a one-year term outside Norway, or NOK 1,790 before 25% MVA in Norway (NOK 2,237.50 total). EV starts at €289 for one year outside Norway, or NOK 3,490 before MVA in Norway (NOK 4,362.50 total). One-, two- and three-year terms are paid in full at order; longer terms include a new certificate issued each year. Cloud signing and timestamping are included.
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS
Windows

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

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

Archi Systems AS

Date Founded

2010

Company Location

Norway

Company Website

klarseal.com

Categories and Features

Code Signing

Not specified

Categories and Features

Code Signing

Not specified

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