Digital Signature

A digital signature is a cryptographic construction using a private key to sign data such that anyone with the corresponding public key can verify both the origin and the integrity. Algorithms include RSA-PSS, ECDSA, EdDSA, and post-quantum candidates. Digital signatures underpin X.509 certificates, code signing, JWT tokens, and STIR caller-ID attestation.

Categories: Security ControlsProtocols and StandardsInternet and Routing

Digital Signature in context

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

Telecom security is written into standards from 3GPP, GSMA, ETSI, IETF and ITU-T. Understanding which body owns which specification, and how they interlock, is essential for both design and audit work.

To place Digital Signature in the wider telecom-security picture, review 3G, A5/1, IPv6, OSPF, SHA and SIRT — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.