Microsoft Root Certificate Authority 2011cer Work !!top!! May 2026

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This page contains download links for PuTTY release 0.81.

0.81, released on 2024-04-15, is not the latest release. See the Latest Release page for the most up-to-date release (currently 0.83).

Past releases of PuTTY are versions we thought were reasonably likely to work well, at the time they were released. However, later releases will almost always have fixed bugs and/or added new features. If you have a problem with this release, please try the latest release, to see if the problem has already been fixed.

Package files

You probably want one of these. They include versions of all the PuTTY utilities (except the new and slightly experimental Windows pterm).

(You probably want the 64-bit x86 version. The 32-bit version is only for backward compatibility with very old PCs / versions of Windows.)

MSI (‘Windows Installer’)
64-bit x86: putty-64bit-0.81-installer.msi (signature)
64-bit Arm: putty-arm64-0.81-installer.msi (signature)
32-bit x86: putty-0.81-installer.msi (signature)
Unix source archive
.tar.gz: putty-0.81.tar.gz (signature)

Alternative binary files

Microsoft Root Certificate Authority 2011cer Work !!top!! May 2026

Microsoft Root Certificate Authority (CA) is a trusted certificate authority that issues digital certificates to organizations and individuals. In 2011, Microsoft released a new root certificate, which is still in use today. The Microsoft Root Certificate Authority 2011.cer is a critical component of the Microsoft Public Key Infrastructure (PKI) and plays a vital role in ensuring the security and trustworthiness of online communications.

A Root Certificate Authority is a certificate authority that issues certificates to other certificate authorities, which are known as intermediate or subordinate certificate authorities. These intermediate certificate authorities then issue certificates to end-users, such as individuals or organizations. The root certificate authority is the highest-level certificate authority in a certificate chain and is used to establish trust in a certificate. microsoft root certificate authority 2011cer work

The Microsoft Root Certificate Authority 2011.cer is a X.509 encoded certificate file that contains the public key and identity information of the Microsoft Root Certificate Authority. This certificate is used to verify the identity of Microsoft and to establish a secure connection between a client and a server. Microsoft Root Certificate Authority (CA) is a trusted

In conclusion, the Microsoft Root Certificate Authority 2011.cer is a critical component of Microsoft's PKI, playing a vital role in ensuring the security and trustworthiness of online communications. Its importance lies in its role as a trust anchor, enabling secure communication and verifying digital signatures. As a widely trusted root certificate authority, the Microsoft Root Certificate Authority 2011.cer continues to be an essential part of online security infrastructure. A Root Certificate Authority is a certificate authority

The Microsoft Root Certificate Authority 2011.cer is a self-signed certificate, which means that it is signed with its own private key. This certificate is valid for a specific period, typically several years, and can be used to issue other certificates.

Documentation

Browse the documentation on the web
HTML: Contents page
Downloadable documentation
Zipped HTML: puttydoc.zip
Plain text: puttydoc.txt
Windows HTML Help: putty.chm

Source code

Unix source archive
.tar.gz: putty-0.81.tar.gz (signature)
Windows source archive
.zip: putty-src.zip (signature)
git repository
Clone: https://git.tartarus.org/simon/putty.git
gitweb: main | 0.81 release tag

Downloads for 32-bit Windows on Arm

Compiled executable files for 32-bit Windows on Arm. We've had reports that these can be useful on Windows IoT Core.

32-bit Windows on Arm installer
32-bit Arm: putty-arm32-0.81-installer.msi (signature)
32-bit Windows on Arm individual executables
32-bit Arm: putty.exe (signature)
32-bit Arm: pscp.exe (signature)
32-bit Arm: psftp.exe (signature)
32-bit Arm: puttytel.exe (signature)
32-bit Arm: plink.exe (signature)
32-bit Arm: pageant.exe (signature)
32-bit Arm: puttygen.exe (signature)
32-bit Arm: pterm.exe (signature)
Zip file of all 32-bit Windows on Arm executables
32-bit Arm: putty.zip (signature)

Checksum files

Cryptographic checksums for all the above files
MD5: md5sums (signature)
SHA-1: sha1sums (signature)
SHA-256: sha256sums (signature)
SHA-512: sha512sums (signature)


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(last modified on Sun Jan 11 00:43:18 2026)