Depricated SSL/TLS Protocols and Ciphers you should not use

 As cybersecurity threats evolve, older SSL/TLS protocols and ciphers that were once considered secure have become deprecated due to vulnerabilities and weaknesses. Here are some of the deprecated SSL/TLS protocols and ciphers:

Deprecated SSL/TLS Protocols:

1.     SSLv2: SSL version 2 is highly insecure and has numerous vulnerabilities, including susceptibility to various attacks like the BEAST attack. It's considered completely obsolete and should not be used.

2.     SSLv3: SSL version 3 is also deprecated due to vulnerabilities like POODLE (Padding Oracle On Downgraded Legacy Encryption). It's no longer considered secure.

3.     TLS 1.0: TLS 1.0 is deprecated because it's vulnerable to attacks like BEAST and POODLE. It lacks some modern security features found in newer TLS versions.

4.     TLS 1.1: TLS 1.1 is considered weak and is also deprecated in many security-conscious environments.

Deprecated SSL/TLS Cipher Suites:

1.     RC4: The RC4 cipher is deprecated due to multiple vulnerabilities, including biases that allow for practical attacks. It's recommended to avoid using RC4 in favor of stronger ciphers like AES.

2.     DES (Data Encryption Standard): DES is considered weak due to its small key size, making it vulnerable to brute-force attacks. It's deprecated in favor of stronger encryption algorithms.

3.     3DES (Triple Data Encryption Standard): While 3DES was once considered secure, its key length and vulnerability to certain attacks make it deprecated in favor of more robust encryption algorithms.

4.     EXPORT Cipher Suites: These cipher suites were designed to comply with export restrictions on encryption technology in the 1990s. They have extremely weak key lengths and are deprecated.

5.     NULL Cipher Suites: These cipher suites provide no encryption, making data transmission completely insecure. They should never be used.

6.     Anon Cipher Suites: Anonymous cipher suites don't require the server to present a digital certificate, making them susceptible to man-in-the-middle attacks. They are deprecated for security reasons.

7.     Cipher Suites with Weak Key Lengths: Cipher suites with key lengths less than 128 bits (e.g., 40-bit or 56-bit keys) are deprecated due to their vulnerability to brute-force attacks.

It's crucial to keep your SSL/TLS configurations up to date and avoid using deprecated protocols and ciphers to maintain a high level of security for your web services. Most modern web browsers and servers have deprecated these older protocols and ciphers as well, and it's essential to configure your systems to use only strong, secure options to protect against potential security threats.