1. [JA3 Fingerprint](https://scrapfly.io/web-scraping-tools/ja3-fingerprint)
2. [ Cipher Suites ](https://scrapfly.io/web-scraping-tools/ja3-fingerprint/cipher-suites "Browse all TLS Cipher Suites")
3. TLS\_AES\_256\_GCM\_SHA384
 
   [  Browse All Cipher Suites ](https://scrapfly.io/web-scraping-tools/ja3-fingerprint/cipher-suites) 

 # TLS\_AES\_256\_GCM\_SHA384

 TLS 1.3 | 256-bit Recommended

 

### Cipher Suite Details



Cipher Suite Name

`TLS_AES_256_GCM_SHA384`

 

Hex Value

`0x1302`

 

Decimal Code

`4866`

 

TLS Version

TLS 1.3

 

Security Level

256-bit

 

Recommended

  Yes 

 

 

 

### What is TLS\_AES\_256\_GCM\_SHA384?



TLS\_AES\_256\_GCM\_SHA384 provides 256-bit security using AES-256 in GCM mode with SHA-384. It offers a higher security margin than AES-128, suitable for government and military applications requiring long-term secrecy. AES-256-GCM is approved for TOP SECRET data in the U.S. government (NSA Suite B). However, AES-256 is approximately 40% slower than AES-128 due to additional rounds (14 vs 10). For most commercial applications, the extra security is unnecessary. TLS 1.3 mandates support for this cipher suite. It is commonly offered as a fallback after TLS\_AES\_128\_GCM\_SHA256.



 

### Role in JA3 Fingerprinting



The **TLS\_AES\_256\_GCM\_SHA384** cipher suite is part of the TLS Client Hello that JA3 analyzes. Cipher suite order and selection are key indicators of browser type and version.

**JA3 Format:** `TLS_VERSION,CIPHERS,EXTENSIONS,CURVES,POINT_FORMATS`

Different browsers prioritize different cipher suites (Chrome prefers ChaCha20 on mobile, Firefox prioritizes AES-GCM, etc.), making cipher suite ordering a reliable fingerprint.

 

 

 

### Test Your Cipher Suites



 [  View Your JA3 Fingerprint ](https://scrapfly.io/web-scraping-tools/ja3-fingerprint) 

See which cipher suites your browser advertises, including TLS\_AES\_256\_GCM\_SHA384.

 

### Technical References



- [RFC 8446 - Cipher Suite Specification ](https://datatracker.ietf.org/doc/html/rfc8446)
- [ciphersuite.info - TLS\_AES\_256\_GCM\_SHA384 ](https://ciphersuite.info/cs/TLS_AES_256_GCM_SHA384/)
- [IANA TLS Cipher Suites Registry ](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4)