SSL Cipher Check Tool Download: How to Test and Secure Your Website with SSL/TLS
If you have a website that collects or transmits sensitive information such as personal data, login credentials, payment details, etc., you need to secure it with SSL/TLS. SSL/TLS is a protocol that encrypts the communication between a web browser and a web server, ensuring that no one can intercept or tamper with the data. However, not all SSL/TLS configurations are created equal. Depending on the type and order of the algorithms or ciphers used to establish the secure connection, the encryption strength and performance may vary significantly.
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In this article, we will explain what an SSL cipher is and how it affects the security of your website. We will also show you how to use some free tools to test your website's SSL/TLS configuration and identify any potential vulnerabilities or weaknesses. Finally, we will provide you with some best practices and recommendations to improve your website's SSL/TLS security and protect your visitors from cyberattacks.
What is SSL/TLS and why is it important for website security?
SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that provide security for data transmission over the Internet. They use a combination of symmetric encryption (where both parties share a secret key) and asymmetric encryption (where each party has a public key and a private key) to establish a secure connection between a client (such as a web browser) and a server (such as a website).
SSL/TLS is important for website security because it prevents anyone from eavesdropping, modifying or stealing the data that is exchanged between the client and the server. Without SSL/TLS, any information that you enter or receive on a website could be intercepted by hackers, identity thieves, malware or spyware. This could result in data breaches, fraud, identity theft, phishing attacks or other malicious activities.
SSL/TLS also provides authentication for both parties involved in the communication. This means that the client can verify that the server is who it claims to be (and vice versa) by checking its digital certificate. A digital certificate is a document that contains information about the identity of the server (such as its domain name, organization name, location, expiration date, etc.) and a digital signature from a trusted third party called a certificate authority (CA). A CA is an organization that verifies the identity of the server and issues the certificate. Some examples of CAs are DigiCert, Let's Encrypt, Comodo, etc.
When you visit a website that uses SSL/TLS, you will see a padlock icon in the address bar of your browser, indicating that the connection is secure. You can also click on the padlock icon to view more details about the certificate and the encryption level of the connection.
What is an SSL cipher and how does it affect the encryption strength of the connection?
An SSL cipher is a set of algorithms or rules that determine how the data is encrypted and decrypted between the client and the server. An SSL cipher consists of four components:
A key exchange algorithm that establishes a shared secret key between the client and the server
An authentication algorithm that verifies the identity of the server and optionally the client
An encryption algorithm that encrypts the data using the shared secret key
A message authentication code (MAC) algorithm that ensures the integrity of the data
An example of an SSL cipher is ECDHE-RSA-AES256-GCM-SHA384, which means:
ECDHE: Elliptic Curve Diffie-Hellman Ephemeral, a key exchange algorithm that provides forward secrecy (a feature that prevents past sessions from being decrypted even if the secret key is compromised)
RSA: Rivest-Shamir-Adleman, an authentication algorithm that uses public-key cryptography
AES256: Advanced Encryption Standard with 256-bit key size, an encryption algorithm that provides strong symmetric encryption
GCM: Galois/Counter Mode, a mode of operation that provides authenticated encryption with associated data (AEAD), which combines encryption and MAC in one step
SHA384: Secure Hash Algorithm with 384-bit output size, a MAC algorithm that provides data integrity
The choice and order of the SSL ciphers affect the encryption strength and performance of the connection. Some SSL ciphers are stronger than others, depending on the type and size of the algorithms used. For example, AES256 is stronger than AES128, and ECDHE is stronger than RSA. Some SSL ciphers are also faster than others, depending on the computational complexity and overhead of the algorithms used. For example, AES-GCM is faster than AES-CBC, and ECDHE is faster than DHE.
Therefore, it is important to use strong and fast SSL ciphers for your website's SSL/TLS configuration. You can use tools such as Nartac Software - IIS Crypto or DigiCert - Installation Diagnostics Tool to check and modify your website's supported SSL ciphers.
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How to use SSL cipher check tools to test your website's SSL/TLS configuration
There are many free tools available online that can help you test your website's SSL/TLS configuration and identify any potential vulnerabilities or weaknesses. Here are some of them:
Nartac Software - IIS Crypto
Nartac Software - IIS Crypto is a free tool for Windows servers that lets you enable or disable protocols, ciphers, hashes and key exchange algorithms on your server with a simple graphical interface. You can also reorder cipher suites, implement best practices, create custom templates and test your website with a built-in browser.
To use this tool, you need to download it from and run it on your server. You will see a window like this:
You can select or deselect protocols, ciphers, hashes and key exchange algorithms by checking or unchecking the boxes next to them. You can also use the buttons on the right side to apply predefined templates such as Best Practices, PCI 3.1 or FIPS 140-2. You can also create your own custom template by clicking on New Template.
After you have made your changes, you need to click on Apply to save them and restart your server. You can also click on Test to open a built-in browser and test your website's SSL/TLS configuration.
DigiCert - Installation Diagnostics Tool
DigiCert - Installation Diagnostics Tool is a free online tool that helps you identify specific installation problems with your website's SSL/TLS certificate. It also examines supported cipher suites, checks expiration date and tests for Heartbleed Bug vulnerability To use this tool, you need to enter your website's domain name in the box and click on Test. You will see a report like this:
You can see the status of your certificate installation, such as whether it is valid, expired, self-signed, revoked, etc. You can also see the details of your certificate, such as the issuer, subject, serial number, signature algorithm, etc. You can also see the supported cipher suites and their order, as well as the SSL/TLS protocols that are enabled or disabled on your server. You can also see if your website is vulnerable to the Heartbleed Bug, a serious security flaw that allows attackers to steal information from servers that use OpenSSL.
SSL Diagnos
SSL Diagnos is a free tool that tests SSL strength, shows information about SSL protocols and cipher suites, and supports pop3s, sip, smtp and explicit ftps. It can also generate SSL certificates and keys for testing purposes.
To use this tool, you need to download it from and run it on your computer. You will see a window like this:
You can enter your website's domain name or IP address in the box and click on Connect. You will see a report like this:
You can see the SSL/TLS protocol version and cipher suite that are used for the connection, as well as the key size and encryption strength. You can also see the details of the certificate, such as the issuer, subject, validity period, etc. You can also see the supported cipher suites and their order by clicking on Show Cipher Suites.
How to improve your website's SSL/TLS security with best practices and recommendations
Now that you have tested your website's SSL/TLS configuration and identified any potential vulnerabilities or weaknesses, you may want to improve your website's SSL/TLS security with some best practices and recommendations. Here are some of them:
Use a reputable certificate authority (CA) to obtain a valid SSL/TLS certificate for your website
A valid SSL/TLS certificate is essential for establishing trust and credibility with your visitors. A valid certificate means that it is issued by a reputable CA that verifies the identity of the server and that it is not expired, revoked or tampered with. A valid certificate also ensures that your visitors will not see any warning messages or errors when they access your website.
There are many CAs that offer different types of certificates for different purposes and prices. Some of them are free, such as Let's Encrypt or Cloudflare, while others are paid, such as DigiCert or Comodo. You should choose a CA that meets your needs and budget, and that provides good customer support and security features.
To obtain a valid certificate from a CA, you need to generate a certificate signing request (CSR) on your server and submit it to the CA. The CA will then verify your identity and issue you a certificate that you need to install on your server. You can use tools such as Nartac Software - IIS Crypto or DigiCert - Certificate Utility for Windows to generate a CSR and install a certificate on your server.
Keep your server software and SSL/TLS libraries up to date with the latest patches and updates
Keeping your server software and SSL/TLS libraries up to date is important for maintaining the security and performance of your website. New patches and updates may fix bugs, vulnerabilities or compatibility issues that could affect your website's functionality or expose it to attacks. For example, updating OpenSSL may prevent the Heartbleed Bug or updating Apache may prevent the POODLE attack.
You should regularly check for updates from your server software vendor or provider and apply them as soon as possible. You should also backup your data before updating in case something goes wrong. You can use tools such as Nartac Software - IIS Crypto or DigiCert - Installation Diagnostics Tool to check if your server software or SSL/TLS libraries need updating.
Disable weak protocols and ciphers such as SSL 2.0, 3.0, MD5 and 3DES
Disabling weak protocols and ciphers is essential for enhancing the encryption strength of your website. Weak protocols and ciphers are those that have been proven to be insecure or vulnerable to attacks by hackers or researchers. For example, SSL 2.0 and 3.0 are susceptible to man-in-the-middle attacks, MD5 is vulnerable to collision attacks, and 3DES is vulnerable to brute-force attacks. Using weak protocols and ciphers could compromise the security of your website and expose your data to hackers.
You should disable weak protocols and ciphers on your server and only enable strong ones that provide adequate encryption and performance. You can use tools such as Nartac Software - IIS Crypto or DigiCert - Installation Diagnostics Tool to disable weak protocols and ciphers and enable strong ones on your server.
Enable forward secrecy and TLS 1.3 to enhance the encryption strength and performance of the connection
Enabling forward secrecy and TLS 1.3 is beneficial for improving the encryption strength and performance of your website. Forward secrecy is a feature that prevents past sessions from being decrypted even if the secret key is compromised. It does this by using ephemeral key exchange algorithms that generate a new key for each session and discard it after the session is over. TLS 1.3 is the latest version of the SSL/TLS protocol that offers faster and more secure connections than previous versions. It does this by reducing the number of round trips required to establish a connection, removing support for weak protocols and ciphers, and adding support for new features such as 0-RTT (zero round-trip time) and AEAD (authenticated encryption with associated data).
You should enable forward secrecy and TLS 1.3 on your server and ensure that your clients support them as well. You can use tools such as Nartac Software - IIS Crypto or DigiCert - Installation Diagnostics Tool to enable forward secrecy and TLS 1.3 on your server.
Use Qualys SSL Labs or Geekflare TLS Scanner API to perform a comprehensive analysis of your website's SSL/TLS configuration and get a detailed report with suggestions for improvement
Using Qualys SSL Labs or Geekflare TLS Scanner API is useful for performing a comprehensive analysis of your website's SSL/TLS configuration and getting a detailed report with suggestions for improvement. These tools test your website's SSL/TLS configuration from various aspects, such as certificate validity, protocol support, cipher strength, key exchange, forward secrecy, HSTS (HTTP Strict Transport Security), HPKP (HTTP Public Key Pinning), OCSP stapling, etc. They also give you a score from A+ to F based on your website's SSL/TLS security level.
To use these tools, you need to enter your website's domain name in the box and click on Test. You will see a report like this:
You can see the score and the summary of your website's SSL/TLS configuration, as well as the details of each test and the suggestions for improvement. You can also compare your website's SSL/TLS configuration with other websites or industry standards.
Conclusion
In conclusion, SSL/TLS is a protocol that encrypts the communication between a web browser and a web server, ensuring that no one can intercept or tamper with the data. However, not all SSL/TLS configurations are created equal. Depending on the type and order of the algorithms or ciphers used to establish the secure connection, the encryption strength and performance may vary significantly.
Therefore, it is important to test and secure your website's SSL/TLS configuration with some free tools that can help you identify any potential vulnerabilities or weaknesses. It is also important to improve your website's SSL/TLS security with some best practices and recommendations that can enhance the encryption strength and performance of the connection.
We hope that this article has helped you understand what an SSL cipher is and how it affects the security of your website. We also hope that you have learned how to use some free tools to test your website's SSL/TLS configuration and how to improve it with some best practices and recommendations.
If you have any questions or feedback, please feel free to leave a comment below or contact us at support@bing.com. We would love to hear from you!
FAQs
What is the difference between SSL and TLS?
SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that provide security for data transmission over the Internet. They are essentially the same thing, but TLS is the newer and more secure version of SSL. The current version of TLS is 1.3, while the current version of SSL is 3.0. However, many people still use the term SSL to refer to both protocols interchangeably.
How can I check if my website has a valid SSL/TLS certificate?
You can check if your website has a valid SSL/TLS certificate by using tools such as DigiCert - Installation Diagnostics Tool or Qualys SSL Labs. These tools will check if your certificate is issued by a reputable CA, if it is not expired, revoked or tampered with, and if it matches your domain name. They will also show you the details of your certificate, such as the issuer, subject, validity period, etc.
How can I check if my browser supports SSL/TLS?
You can check if your browser supports SSL/TLS by visiting a website that uses SSL/TLS, such as If your browser supports SSL/TLS, you will see a padlock icon in the address bar, indicating that the connection is secure. You can also click on the padlock icon to view more details about the certificate and the encryption level of the connection.
You can also use tools such as How's My SSL? or SSL Client Test to test your browser's SSL/TLS capabilities and compatibility. These tools will show you the SSL/TLS protocol version and cipher suite that your browser uses, as well as the supported protocols and ciphers. They will also warn you of any potential problems or vulnerabilities that your browser may have.
What are some common SSL/TLS errors and how to fix them?
Some common SSL/TLS errors that you may encounter when visiting a website that uses SSL/TLS are:
Certificate not trusted: This means that the certificate is not issued by a reputable CA or that the CA is not recognized by your browser. To fix this, you need to either install the CA's root certificate on your device or use a different browser that trusts the CA.
Certificate expired: This means that the certificate has passed its validity period and is no longer valid. To fix this, you need to either contact the website owner to renew the certificate or visit the website at a later time when the certificate is renewed.
Certificate mismatch: This means that the certificate does not match the domain name of the website. This could happen if the website uses a subdomain or a wildcard certificate that does not cover the specific domain name. To fix this, you need to either contact the website owner to obtain a certificate that matches the domain name or use a different website that has a matching certificate.
Protocol or cipher mismatch: This means that your browser and the server do not support the same SSL/TLS protocol version or cipher suite. This could happen if your browser or the server is outdated or misconfigured. To fix this, you need to either update your browser or the server software to support the latest SSL/TLS protocol version and cipher suite or use a different browser or server that supports them.
Where can I learn more about SSL/TLS?
If you want to learn more about SSL/TLS, you can visit some of these websites:
: A website that provides information, resources and services related to SSL/TLS.
: A website that provides tutorials, guides and articles about SSL/TLS.
: A website that provides knowledge base articles and support for SSL/TLS certificates and tools.
: A website that provides information and documentation about OpenSSL, an open source software library that implements SSL/TLS.
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