SSL Security Test of www.deepl.com

Test the SSL/TLS stack of your web or email server for security, cryptographic flaws and misconfigurations, and compliance with NIST & HIPAA
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  • Web Server SSL/TLS Security
  • Post-Quantum Cryptography (PQC) Readiness
  • Email Server SSL/TLS Security
  • PCI DSS, HIPAA & NIST Compliance
  • SSL Certificate Validity
  • Best-Practices Compliance
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181,444,565 tests performed
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145
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56,281
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Summary of www.deepl.com:443 (HTTPS) SSL Security Test

Provided "as is" without any warranty of any kind.
This test was made 75 days ago and may be outdated
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Date/Time:Mar 11th, 2026 08:46 GMT+0
Source IP/Port:172.64.148.47:443
Protocol:HTTPS
Location:Unknown
Your final score:
  • A
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  • F
A+

Executive Summary for www.deepl.com

  • Post-Quantum Cryptography (PQC) Readiness Test
    This server on the tested port supports only hybrid ML-KEM key exchange groups, which are recommended by NIST for the transition period. The server’s certificate chain relies entirely on classical signature algorithms without post-quantum support. Show details.
  • SSL/TLS Certificate Analysis
    2 SSL/TLS end-entity certificate(s) detected: the first certificate is a trusted RSA 2048 bits certificate with issuer WR1 valid until April 28, 2026; the second certificate is a trusted ECDSA 256 bits certificate with issuer WE1 valid until April 28, 2026. 5 certificate chain(s) detected. Show details.
  • PCI DSS Compliance Test
    All 7 supported cipher suite(s) are compliant with PCI DSS. The server supports only PCI DSS compliant protocols: TLSv1.2 and TLSv1.3. All supported elliptic curves are compliant with PCI DSS: P-256, P-384, P-521 and X25519. No additional PCI DSS compliance issues were identified. Show details.
  • NIST and HIPAA Compliance Test
    1 of 7 supported cipher suites are not compliant with NIST and HIPAA. The server supports only NIST and HIPAA compliant protocols: TLSv1.2 and TLSv1.3. All supported elliptic curves are compliant with NIST and HIPAA: P-256, P-384, P-521 and X25519. No additional NIST and HIPAA compliance issues were identified. Show details.
  • Industry Best Practices Test
    No issues related to industry best practices were identified. Show details.
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