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TLS_AES_128_CCM_SHA256

TLS 1.3 | 128-bit Not Recommended

Cipher Suite Details

Cipher Suite Name
TLS_AES_128_CCM_SHA256
Hex Value
0x1304
Decimal Code
4868
TLS Version
TLS 1.3
Security Level
128-bit
Recommended
No

What is TLS_AES_128_CCM_SHA256?

TLS_AES_128_CCM_SHA256 uses AES-128 in CCM (Counter with CBC-MAC) mode. CCM is an alternative AEAD mode to GCM, designed for resource-constrained devices like IoT sensors and embedded systems. CCM requires less memory and simpler hardware compared to GCM but is not parallelizable, making it slower on multi-core processors. CCM is defined in RFC 3610 and is widely used in wireless sensor networks (IEEE 802.15.4, Zigbee, Bluetooth LE). TLS 1.3 includes CCM for IoT compatibility, but it is rarely used in standard web browsers and servers.

Role in JA3 Fingerprinting

The TLS_AES_128_CCM_SHA256 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.

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Technical References