ECDSA (Elliptic Curve Digital Signature Algorithm)

Also known as: Elliptic Curve DSA

ECDSA (FIPS 186-5) is a digital signature algorithm over elliptic curves, typically P-256 or P-384 in telecom deployments. It is widely used for TLS/IPsec certificates, SEPP N32 signing, subscription concealed identifier (SUCI) authentication and code signing, offering shorter keys and signatures than RSA at equivalent security.

Categories: SignalingRoaming and InterconnectIdentity and Subscriber

ECDSA in context

Signaling protocols carry the control-plane messages that set up calls, register subscribers and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA as top-tier telecom risk.

Roaming and interconnect are where two operators exchange signaling and user-plane traffic. Trust boundaries here are the primary attack surface for location tracking, SMS interception and fraud, which is why GSMA now mandates SEPP with PRINS on 5G interconnect.

To place ECDSA in the wider telecom-security picture, review Behavioral Signaling Detection, FS.11, GRE, Roaming, Roaming Interconnect Security and Roaming Security Assessment — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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