---
title: Acronymes cyber & réseaux télécoms
date: 2024-05-09
---

Contribuez à la mise à jour de cette liste ici : [mise à jour](https://github.com/M82-project/Dictionnaire_Cyber_public/blob/main/2.%20Acronymes)
Les acronymes télécoms sont issus de l'excellent travail regroupé ici : [GLOTEL](http://abcdrfc.free.fr/ressources-vf/GLOTEL.html)

## Chiffre 
* 2FA : Two Factor Authentication
* 3DES : Triple Data Encryption Standard

## A
* AAA : Authentication, Authorization, Accounting.
* ABAC : Attributed-Based Access Control.
* ABCDE : Actors, Behaviour, Content, Degree, Effect.
* ACL : Access Control List.
* ACM : Access Control Matrix.
* ACS : Annual Cost of Safeguard.
* ACSSI : Article Contrôlé de la Sécurité des Systèmes d'Information.
* AD : Active Directory.
* ADSL : Asymmetrical Digital Subscriber Line.
* AES : Advanced Encryption Standard.
* AET : Advanced Evasion Techniques.
* AFF : Advanced Forensic Format.
* AFNIC : Association Française pour le Nommage Internet en Coopération.
* AFNOR : Association Française de NORmalisation.
* AH : Authentication Header.
* AIPD : Analyse d'Impact sur la Protection des Données
* ALE : Annualized Loss Expectancy
* AMRC : Accès Multiple par répartition en code.
* AMRF : Accès Multiple par répartition en fréquence.
* AMRT : Accès multiple par répartition temporelle.
* ANFR : Agence Nationale des Fréquences.
* ANSSI : Agence Nationale de la Sécurité des Systèmes d’Information.
* AP : Access Point.
* API : Application Programming Interface.
* APT : Advanced Persistant Threat.
* ARO : Annualized Rate Of Occurence.
* ARP : Address Resolution Protocol. 
* ARPANET : Advanced Research Projects Agency NETwork.
* ASCII : American Standard Code for Information Interchange.
* ASLR : Address Space Layout Randomizarion.
* ASVS : Application Security Verification Standard.
* ATT&CK : Adversarial Tactics, Techniques and Common Knowledge
* AuC : Authentication Center.
* AV : AntiVirus.
* AV : Asset Value.
* AV-NG : AntiVirus Next-Gen cf EDR, XDR
  
## B
* BAN : Body Area Network.
* BAS : Breach Attack Simulations.
* BEC : Business Email Compromise.
* BECN : Backward explicit congestion notification.
* BGP : Border Gateway Protocol.
* BI : Business Intelligence.
* BIA : Business Impact Analysis.
* BIOS : Basic Input Output System.
* BITD : Base Industrielle et Technologique de Défense.
* BRP : Business Recovery Plan.
* BSC : Base Station Controller.
* BSIMM : Business Security in Maturity Model.
* BSS : Base Station Subsystem.
* BTS : Base Transceiver Station.
* BYOD : Bring Your Own Device.
* BYOE : Bring Your Own Encryption.
* BYOK : Bring Your Own Key.

## C
* C2 : Command and Control.
* CA : Certificate Auhority.
* CALID : Centre d’Analyse et de Lutte Informatique Défensive.
* CAPEC : Common Attack Pattern Enumeration and Classifica-tion.
* CAPTCHA : Completely Automated Public Turing test to tell Computers and Humans Apart
* CASB : Cloud Access Security Broker.
* CASE : Common Application Services Elements.
* CBAC : Context-Based Access Control.
* CBC : Cypher block chain.
* CBR : Constant Bit Rate.
* CC : Certified in Cybersecurity.
* CC : Common Criterias.
* CC : Creative Commons.
* CCC : Chaos Computer Club.
* CCDCOE : Cooperative Cyber Defence Centre of Excellence.
* CCM : Cloud Controls Matrix.
* CCMP : Counter-Mode/CBC-Mac protocol.
* CCRA : Cloud Computing Reference Architecture.
* CCSK : Cloud Computing Security Knowledge.
* CCTL : Common Criteria Testing Laboratories.
* CDMA : Code Division Multiple Access.
* CDN : Content Delivery Network.
* CEI : Commission Electrotechnique Internationale.
* CEN : Comité Européen de Normalisation.
* CERT : Computer Emergency Response Team.
* CESIN : Club des Experts de la Sécurité de l'Information et du Numérique.
* CFB : Cipher FeedBack Block.
* CFU : Call Forwarding Unconditional.
* CHAP : Challenge Handshake Authentication Protocol.
* CIDR : Classless Inter-Domain Routing.
* CIEM : Cloud Infrastructure Entitlement Management.
* CIRP : Cyber Incident Response Plan.
* CIS : Center for Internet Security.
* CISA : Certified Information Systems Auditor.
* CISA : Cybersecurity and Infrastructure Security Agency.
* CISO : Chief Information Security Officer.
* CISSP : Certified Information Systems Security Professional.
* CLUSIF : Club de la Sécurité de l'Information Français.
* CMM : Capability Maturity Model.
* CMMI : Capability Maturity Model Integration.
* CMS : Content Management System.
* CMS : Credential Management System.
* CNA : Computer Network Attack.
* CNAPP : Cloud Native Application Protection Plateform.
* CNE : Computer Network Exploitation.
* CNIL : Commission Nationale Informatique et Liberté.
* CNO : Computer Network Operation.
* COBIT : Control Objectives for Information and related Technology.
* COIN : Contre insurrection.
* COOP : Continuity Of Operations Plan.
* CORS : Cross-Origin Resource Sharing.
* COTS : Commercial Off-the-Shelf Software.
* CPE : Common Platform Enumeration.
* CPSO : Chief Product Security Officer.
* CPL : Courant Porteur en Ligne.
* CRL : Certificate Revocation List.
* CRLDP : Certificate Revocation List Distribution Point.
* CSA : Cloud Security Alliance.
* CSF : CyberSecurity Framework.
* CSIRT : Computer Security Incident Response Team.
* CSO : Chief Security Officer.
* CSO : Cloud Security Provider.
* CSP : Content Security Policy.
* CSPM : Cloud Security Posture Management.
* CSPN : Certification de Sécurité de Premier Niveau.
* CSR : Certificate Signing Request.
* CSRF : Cross Site Request Forgery.
* CSMA/CD : Carrier-Sense Multiple Access with Collision Detection.
* CSS : Cascading Style Sheets.
* CTI : Cyber Threat Intelligence.
* CTR : Common Technical Regulation.
* CVE : Common Vulnerabilities and Exposure.
* CVSS : Common Vulnerability Scoring System.
* CWE : Common Weakness Enumeration.
* CWPP : Cloud Workload Protection Platform.
* CWSS : Common Weakness Scoring System.

## D
* DAM : Database Activity Monitoring.
* DAST : Dynamic Application Security Testing.
* DARPA : Departement of Advanced Research Projects Agency.
* DCS : Digital Communication System.
* DDOS : Distributed Deny Of Service.
* DEA : Data Encryption Algorithm.
* DECT : Digital Enhanced Cordless Telecommunication.
* DEFCON : DEFense readiness CONdition.
* DEP : Data Execution Prevention.
* DES : Data Encryption Standard.
* DHCP : Dynamic Host Configuration Protocol.
* DKIM : DomainKeys Identified Mail.
* DLCI : Data Link Channel Identifier.
* DLL : Dynamic Link Library, bibliothéque de liens dynamique.
* DLP : Data Loss Prevention.
* DMARC : Domain Message Authentication Reporting and Conformance.
* DMZ : DeMilitarized Zone.
* DNS : Domain Name System.
* DNSSEC : Domain Name System Security Extensions.
* DOS : Deny Of Service.
* DPD : Délégué à la Protection des Données.
* DPI : Deep Packet Inspection.
* DPIA : Data Protection Impact Assessment.
* DPO : Data Protection Officer.
* DR : Disaster Recovery.
* DREAD : Damage Reproducibility Exploitability Affected users Discoverability.
* DRM : Digital Right Management.
* DRP : Disaster Recovery Plan.
* DSA : Digital Signature Algorithm.
* DSS : Digital Signature Standard.
* DTLS : Datagram Transport Layer Security.
* DV : Domain Validation.

## E
* E2EE : End-To-End Encryption.
* EAL : Evaluation Assurance Level.
* EAP : Extensible Authentication Protocol.
* EASM : External Attack Surface Management.
* EBIOS : Expression des Besoins et Identification des Objectifs de Sécurité.
* EBIOS RM : Expression des Besoins et Identification des Objectifs de Sécurité Risk Manager.
* ECC : Elliptic Curve Cryptography.
* ECDSA : Elliptic Curve Digital Signature Algorithm.
* EDR : Endpoint Detection and Response.
* EER : Equal Error Rate.
* EF : Exposure Fator.
* EFF : Electronic Fontier Foundation.
* EFS : Encryption File System.
* EGP : Exterior Gateway Protocol.
* eIDAS : electronic IDentification, Authentication and trust Services.
* EIGRP : Enhanced Interior Gateway Routing Protocol.
* EIR : Equipment Identity Register.
* EIR : Excess Information Rate.
* EIVP : Etude d'Impact sur la Vie Privée.
* ENISA : European Network for Information Security Agency.
* EPP : Endpoint Protection Platform.
* EPSS : Exploit Prediction Scoring System.
* ESN : Entreprise de Service du Numérique.
* ESP : Encapsulating Security Payload.
* ESSID : Extended Service Set Identifier.
* ETCD : Equipement de Terminaison de Circuits de Données.
* ETSI : European Telecommunications Standard Institute.
* ETTD : Equipement Terminal de Traitement de Données.
* EU5G : European Union 5G Cybersecurity Certification Scheme.
* EUCC : European Union Common Criteria.
* EUCS : European Union Cybersecurity Certification Scheme for Cloud Services.
* EV : Extended Validation.
  
## F
* FAI : Fournisseur d’Accès à Internet.
* FDM : Frequency Division Multiplexing.
* FDE : Full Disk Encryption.
* FDMA : Frequency Division Multiple Access.
* FEC : Forwarding Equivalence Class.
* FECN : Forward Explicit Congestion Notification.
* FEK : File Encryption Key.
* FH : Frequency Hopping.
* FHSS : Frequency Hopping Spread Spectrum.
* FIDO : Fast IDentity Online Alliance.
* FIDO2 : Fast IDentity Online Alliance v2.
* FIFO : First in First out.
* FIPS : Federal Information Processing Standard.
* FIRST : Forum of Incident Response and Security Teams.
* FM : Frequency Modulation.
* FPS : Fast Packet Switching.
* FTP : File Transfert Protocol.
* FVEK : File Volume Encryption key.
* FW : FireWall.

## G
* GAFAM : Google, Apple, Facebook, Amazon, Microsoft.
* GDPR : General Data Protection Regulation.
* GGSN : Gateway GPRS Support Node.
* GMSC : Gateway Mobile Switching Center.
* GMSK : Gaussian Minimum Shift Keying.
* GPG : GNU Privacy Guard.
* GPO : Group Policy Object.
* GPRS : General Packet Radio Service.
* GRC : Gouvernance Risk management and Compliance.
* GRE : Generic Routing Encapsulation.
* GSM : Global System for Mobile Communications.

## H
* HD : Haut Débit.
* HDLC : Hight level Data Link Control.
* HIDS : Host-based Intrusion Detection System.
* HIPS : Host-based Intrusion Prevention System.
* HLR : Home Location Register.
* HMAC : Hash-based Message Authentication Code.
* HOTP : HMAC-based One time Password.
* HSDPA : High Speed Download Packet Access.
* HSM : Hardware Security Module.
* HSN : Hopping Sequence Number.
* HSUPA : High Speed Uplink Packet Access.
* HTML : HyperText Markup Language.
* HTTP : HyperText Transfer Protocol.
* HTTPS : HyperText Transfer Protocol Secured.

## I
* IaaS : Infrastructure as a Service.
* IAB : Initial Access Broker.
* IAB : Internet Activities Board.
* IAB : Internet Architecture Board.
* IAM : Identity and Access Management.
* IANA : Internet Assigned Numbers Authority.
* IAST : Interactive Application Security Test.
* ICANN : Internet Corporation for Assigned Names and Numbers.
* ICMP : Internet Control and error Message Protocol.
* ICP : Infrastructure à Clé Publique.
* IDoT : IDentity of things.
* IDP : Internet Datagram Protocol.
* IDS : Intrusion Detection Systems.
* IEC : International Electrotechnical Commission.
* IEEE : Institute of Electrical and Electronics Engineers.
* IETF : Internet Engineering Task Force.
* IGC : Infrastructure de Gestion de Clés.
* IGP : Interior Gateway Protocol.
* IHM : Interface Homme Machine.
* IKE : Internet key Exchange.
* IMEI : International Mobile Station Equipment Identity.
* IMS : IP Multimédia Subsystem.
* IMSI : International Mobile Subscriber Identity.
* IMT 2000 : International Mobile Telecommunications 2000.
* IoA : Indicator of Attack.
* IoC : Indicator of Compromise.
* IOT : Internet Of Things.
* IP : Internet Protocol.
* IPBX : Internet Protocol-Private Branch Exchange.
* IPS : Intrusion Prevention System.
* IPsec : Internet Protocol Security.
* IR : Incident Response.
* IRT : Incident Response Team.
* IRTF : Internet Research Task Force.
* IS : Information Security.
* ISAKMP : Internet Security Association and Key Management Protocol
* ISC2 : International Information Systems Security Certification Consortium.
* ISCM : Information Security Continuous Monitoring.
* ISDN : Integrates Services Digital Network.
* IS-IS : Intermediate Sytem to Intermediate System.
* ISL : Inter Switch Link.
* ISMS : Information Security Management System.
* ISO : International Standard Organisation.
* ISOC : Internet SOCiety.
* ISTAR : Intelligence, Surveillance, Target Acquisition, and Reconnaissance.
* IT : Information Technology.
* ITA : Information Technology Agreement.
* ITDR : Identity Threat Detection & Response.
* ITIL : Information Technology Infrastructure Library.
* ITU : International Telecommunication Union.
* ITSEC : Information Technology Security Evaluation Criteria.
* IV : Initialization Vector.
* IXFR : Incremental Zone Transfer.

## J
* J2SE : Java 2 Standard Edition.
* J2EE : Java 2 Entreprise Edition.
* J2ME : Java 2 Micro Edition.
* JPEG : Joint Picture Expert Group.
* JS : JavaScript.
* JSON : JavaScript Object Notation.

## K
* KDC : Key Distribution Center.
* KDK : Key Derivation Function.
* KEK : Key Encryption Key.
* KMIP : Key Management Interoperability Protocol.
* KMS : Key Management System.
* KRACK : Key Reinstallation AttaCK.
* KRI : Key Risk Indicator.

## L
* L2I : Lutte Informatique d'Influence.
* L2TP : Layer 2 Tunneling Protocol.
* LA : Location Area.
* LAC : Location Area Code.
* LAI : Location Area Identification.
* LAN - Local Area Network.
* LAP - Link Access Protocol.
* LAPB : Link Access Protocol D-channel.
* LAPD : Link Access Protocol D-channel.
* LCP : Link Control Protocol.
* LDAP : Lightweight Directory Access Protocol.
* LDP : Label Distribution Protocol.
* LEAP : Lightweight Extensible Authentication Protocol.
* LFI : Local File Inclusion.
* LIB : Label Information Base.
* LID : Lutte Informatique Défensive.
* LII : Lutte Informatique d'Influence.
* LIO : Lutte Informatique Offensive.
* LiFi : Light Fidelity.
* LLC : Logical Link Control.
* LLM : Large Language Model.
* LMI : Local Management Interface.
* LMI : Lutte contre la Manipulation de l'Information.
* LoTL : Living off The Land.
* LSA : Local Security Authority.
* LSR : Label Switching Router.
* LTE : Long Term Evolution.

## M 
* MA : Mobile Allocation.
* MAC : Mandatory Access Control.
* MAC : Media Access Control.
* MAC : Message Authentication Code.
* MAEC : Malware Attribute Enumeration and Characterization.
* MAIO : Mobile Allocation Index Offset.
* MAN : Metropolitan Area Network.
* MBR : Master Boot Record.
* MCC : Mobile Country Code.
* MD5 : Message Digest 5.
* MDM : Mobile Device Management.
* MDR : Manage Detection and Response.
* MFA : Multi-Factor Authentication.
* MGCF : Media Gateway Control Function.
* MIB (SNMP) : Management Information Base.
* MIC : Message Integrity Check.
* MIC : Modulation par Impulsions Codées.
* MIME : Multipurpose Internet Mail Extensions.
* MIMO : Multiple Input / Multiple Output.
* MIPS : Menace Informatique et Pratique de Sécurité.
* MISO : Multiple In / Single Out.
* MITM : Man In The Middle.
* MNC : Mobile Network Code.
* MMF : Multimode Fiber.
* MMS : Multimedia Messaging Service.
* MML : Man Machine Language.
* MOA : Maitrise d'OuvrAge.
* MOE : Maitrise d’œuvre.
* MOSPF : Multicast extension Open Shortest Path First.
* MPLS : MultiProtocole Label Switching.
* MSC : Mobile Switching Center.
* MSIN : Mobile Subscriber Identification Number.
* MSISDN : Mobile station ISDN number.
* MSSP : Managed Security Service Provider. 
* MTA : Message Transfer Agent.
* MTBF : Mean Time Between Failure.
* MTTD : Mean Time To Detect.
* MTTR : Mean Time To Remediate.
* MTS : Message Transfer System.
* MTU : Maximum Transmission Unit.
* MVNO : Mobile Virtual Network Operator.

## N
* NAC : Network Access Control.
* NAP : Network Access Protection.
* NAP : Network Access Protocol.
* NAS : Network Access Server.
* NAS : Network Attached Storage.
* NAT : Network Address Translation.
* NAT- PT : Network Address Translation - Protocol Translator.
* NBMA : Non-Broadcast Multi-Access.
* NCIRC : NATO Computer Incident Response Capability.
* NDA : Non-Disclosure Agreement.
* NDR : Network Detection and Response.
* NEB : Numérisation de l’Espace de Bataille.
* NFC : Near Field Communication.
* NFS : Network File System.
* NIC : Network Information Center.
* NIC : Network Interface card.
* NIDP : Network Intrusion Detection and Prevention.
* NIDS : Network Intrusion Detection System.
* NIS : Network and Information Security.
* NIS2 : Network and Information Security v2.
* NIS : Network Information Services.
* NIST : National Institute of Standards and Technology.
* NMS : Network Management System.
* NNI : Network to Network Interface.
* NNTP : Network News transfert Protocol.
* NOC : Network Operations Center.
* NPS : Network Policy Server.
* NRA : Nœud de Raccordement d’Abonné.
* NRO : Nœud de Raccordement Optique.
* NSA : National Security Agency.
* NSAP : Network Service Access Point.
* NSS : Network Sub System.
* NSS : Network Security Services.
* NTA : Network Traffic Analysis.
* NTI : Nœud de Transit International.
* NTIC : Nouvelles Technologies de l’Information et de la Communication.
* NVD : National Vulnerability Database. 

## O
* OATH : Open AuTHentication.
* OAUth : Open AUthorization.
* OBL : Opérateur de Boucle Locale.
* OCF : Open Certification Framework.
* OCSP : Open Certificate Status Protocol.
* OFDM : Orthogonal Frequency Division Multiplexing.
* OIV : Opérateur d’importance vitale.
* OLSR : Optimized Link State Routing Protocol.
* OMG : Object Management Group.
* OODA : Observer, Orienter, Décider, Agir (Observe, Oriente, Decide, Act).
* OpenSSL : Open Secure Socket Layer.
* OPSEC : OPerations SECurity.
* OS : Operating System.
* OSCP : Offensive Security Certified Professional.
* OSI (modèle) : Open Systems Interconnection.
* OSI : Open Source Initiative.
* OSPF : Open Shortest Path First.
* OSS : Operating System and Service.
* OT : Operational Technology.
* OTP : One Time Password.
* OTAN : Organisation du traité de l’atlantique nord.
* OTP : One Time Pad.
* OV : Organization Validation.
* OVAL : Open Vulnerability and Assessment Language.
* OWASP : Open Web Application Security Project.

## P
* PAAS : Platform as a Service.
* PABX : Private Automatic Branch Exchange.
* PACS : Prestataires d’Accompagnement et de Conseil en Sécurité des systèmes d’information.
* PAN : Personal Area Network.
* PAM : Privilege Access Management.
* PAMS : Prestataire d'Administration et de Maintenance Sécurisées.
* PAP : Password Authentication Protocol.
* PASSI : Prestataire d'Audit en Sécurité des Systèmes d’Information.
* PBX : Private Branch Exchange.
* PCA : Plan de continuité d’activité.
* PCI-DSS : Payment Card Industry Data Security Standard.
* PCI-SSC : Payment Card Industry Security Standards Council.
* P-CSCF : Proxy Call Session Control Fonction.
* PDCA : Plan Do Check Act.
* PDIS : Prestataire en Détection des Incidents de Sécurité.
* PDN : Public Data Network.
* PEAP : Protected Extensible Authentication Protocol.
* PFS : Perfect Forward Secrecy.
* PGP : Pretty Good Privacy.
* PHI : Protect Health Information.
* PIA : Privacy Impact Assessment.
* PII : Personaly Identifiable Information.
* PIN : Personal Identification Number.
* PKCS : Public Key Cryptography Standard.
* PKI : Public Key Infrastructure.
* PLMN : Public Land Mobile Network.
* PMK : Pairwise Master Key.
* PMR : Professional Mobile Radio.
* PMS : Pre-Master Secret.
* PNNI : Private Network Network Interface.
* PoC : Proof of Concept.
* PoP : Point of Presence.
* POP3 : Post Office Protocol 3.
* POTS : Plain Old Telephone Service.
* PPP : Point to Point Protocol.
* PPTP : Point-to-Point Tunneling Protocol.
* PRA : Plan de Reprise d’Activité.
* PRI : Primary Rate Interface.
* PRIS : Prestataires de Réponse aux Incidents de Sécurité.
* PSK : Pre-Shared Key.
* PSSI : Politique de Sécurité des Systèmes d'Information.
* PSTN : Public Switched Telephone Network.
* PUK : PIN Unblocking Key.
* PVID : Prestataires de Vérification d'Identité à Distance. 

## Q
* QOS : Quality Of Service.
* QKD : Quantum Key Distribution.

## R
* RADIUS : Remote Authentication Dial-In User Service.
* RAID : Redundant Array of Independent Disks.
* RAM : Random Access Memory
* RARP : Reverse Address Resolution Protocol.
* RASP : Runtime Application Self-Protection.
* RAT : Remote Access Trojan.
* RAT : Remote Administration Tool.
* RBAC : Role-Based Access Control.
* RBL : Realtime Blackhole List.
* RC4 : Rivest Cipher 4.
* RCE : Remote Code Execution.
* RFC : Request For Comment.
* RFID : Radio Frequency Identification.
* RGPD : Règlement Général pour la Protection des Données.
* RGS : Référentiel Général de Sécurité.
* RIC : Renseignement d’intérêt Cyber.
* RIP : Routing Information Protocol.
* RIR : Registre Internet Régionaux, Regional Internet Registry.
* RLC : Radio Link Control.
* RMF : Risk Management Framework.
* RNG : Random Number Generator.
* RNIS : Réseau Numérique à Intégration de Services.
* ROC : Renseignement d’Origine Cyber.
* ROM : Read Only Memory.
* ROM : Return Of Mitigation.
* ROSI : Return On Security Investment.
* RPC : Remote Procedure Call.
* RPO : Recovery Point Objective.
* RSA : Rivest, Shamir, Adleman.
* RSSI : Responsable de la Sécurité des Systèmes d’Information.
* RSVP : Resource Reservation Protocol.
* RTC : Réseau Téléphonique Commuté.
* RTO : Recovery Time Objective.
* RTCP : Real-time Transport Control Protocol.
* RTP : Real-time Transport Protocol.
* RTSP : Real Time Streaming Protocol.

## S
* S/MIME : Secure / Multipurpose Internet Mail Extensions.
* SA : Security Association.
* SA : Source Address.
* SA (Subnet Administrator) = administrateur de sous réseau (RFC4391).
* SaaS : Software as a Service.
* SABM (Set Asynchronous Balanced Mode) = mise en mode asynchrone équilibré (commande d'initialisation de protocole à la couche 2. Sauf mention contraire, SABM désigne aussi bien la forme simple que la forme étendue du message).
* SABM_ACK (Layer two acknowledgment to SABM) = acquittement de SABM à la couche 2.
* SAC (Service Access Code) = code d'accès au service.
* SAC (syntax-based arithmetic coding) = codage arithmétique syntaxique (H.263).
* SAC (Strict Avalanche Criterion) = critère strict d'avalanche (RFC2144).
* SACCH (Slow Associated Control Channel) = canal de signalisation associé lent ; GSM.
* SACCH/Cx (Slow, SDCCH/4 Associated, Control Channel) = canal de signalisation lent associé à un SDCCH/x ; GSM.
* SACCH/T (Slow, TCH-Associated, Control Channel) = canal de signalisation lent associé à un TCH ; GSM.
* SACF (single association control function) = fonction de contrôle à association unique ; fonction de contrôle d’association simple.
* SACK (Selective Acknowledgment) = accusé de réception sélectif (RFC 2018).
* SACRED (Secure Availability of Credentials) = disponibilité sécurisée des accréditifs (RFC 3760).
* SAD (Security Association Database) = base de données d'association de sécurité (RFC3168).
* SADB (Security Association Database) = base de données des associations de sécurité (RFC3554).
* SAE : Simultaneous Authentication as Equals.
* SAF (SACF auxiliary facility) = facilité auxiliaire de fonction SACF (X.862).
* SAFI (Subsequent Address Family Identifier) = identifiant de la famille d'adresse suivante (RFC 4760).
* SAI (Source Attachment Identifier) = identifiant de rattachement de source (RFC5003).
* SAI (satellite air interface) = trajet aérien par satellite.
* SAID (security association identifier) = identifiant d'association de sécurité.
* S-AIS (Section Alarm Indication Signal) = signal d'indication d'alarme sur la section.
* SAM (SCSI Architecture Model) = modèle d’architecture SCSI (RFC7143).
* SAM (subsequent address message) = message d'adresse à suivre ; RNIS/ISUP.
* SAML (Security Assertion Markup Language) = langage de balisage d’assertion de sécurité (X.1142).
* SAN (Storage Area Networking/Network) = mise en réseau de zone de mémorisation/réseau à zone de mémorisation.
* SAN (Subject Alternative Name) = nom de remplacement de sujet (RFC4556).
* SAO (Single Association Objet) = objet d'association unique ; R.I.
* SAP : Service Advertising Protocol.
* SCADA : Supervisory Control And Data Acquisition.
* SCAP : Security Content Automation Protocol.
* SCIM : System for Cross-domain Identity Management.
* SCRM : Supply Chain Risk Management.
* SDL : Software Development Lifecycle.
* SDLC : Synchronous Data Link Control.
* SDLC : Software Development Life Cycle.
* SDMX : Statistical Data and MetaData eXchange.
* SDN : Software-Defined Networks.
* SDO : Software Delivery Objective. 
* SDU : Service Data Unit.
* SD-WAN : Software Defined Wide Area Network.
* SecaaS : Security as a Service.
* SGDSN : Secrétariat Général de la Défense et de la Sécurité Nationale.
* SGML : Standard Generalized Markup Language.
* SH : Safe Harbor.
* SHA : Secure Hash Algorithm.
* SHA-1 : Secure Hash Algorithm-1.
* SHA-2 : Secure Hash Algorithm-2.
* SHA-3 : Secure Hash Algorithm-3.
* SHTTP : Secure Hypertext Transfer Protocol.
* SIEM : Security Information and Event Management.
* SIM : Subscriber Identity Mobile.
* SIP : Session Initiation Protocol.
* SKIP : Simple Key Management for Internet Protocol.
* SLA : Service Level Agreement.
* SLE : Single-Loss Expectancy.
* SLR : Service Level Requirement
* SMB : Server Message Block.
* SMF : Single Mode Fiber.
* SMS : Short Message Service.
* SMSI : Système de Management de la Sécurité de l'Information.
* SMTP : Simple Mail Transfer Protocol.
* SNMP : Simple Network Management Protocol.
* SOA : Service Oriented Architecture.
* SOAP : Simple Object Access Protocol.
* SOAR : Security Orchestration Automation and Response.
* SOC : Security Operations Center.
* SOD : Separation of Duties.
* SOD : Segregation of Duties.
* SOP : Same Origin Policy.
* SPD : Security Policy Database.
* SPF : Sender Policy Framework.
* SPI : Sensitive Personal Information.
* SPI : Stateful Packet Inspection.
* SPI : Security Parameter Index.
* SPML : Service Provisioning Markup Language.
* SPOX : Single Point of Failure.
* SPX : Sequenced Packet eXchange.
* SQL : Structured Query Lanquage.
* SQLI : Structured Query Lanquage Injection.
* SS7 : Signaling System 7.
* S-SDLC : Secure Software Development Life Cycle.
* SSE : Security Service Edge.
* SSH : Secure Shell.
* SSID : Service Set IDentifier.
* SSO : Single Sign On.
* SSID : Service Set IDentifier.
* SSII : Société de Service et d’Ingénierie Informatique.
* SSL : Secure Socket Layer.
* SSL/TLS : Secure Socket Layer/Transport Layer Security.
* SSO : Single Sign-On.
* SSPM : SaaS Security Posture Management.
* SSRF :  Server-Side Request Forgery.
* SSTP : Secure Socket Tunneling Protocol.
* SSVC : Stakeholder-Specific Vulnerability Categorization.
* STAD : Système de Traitement Automatisé de Données.
* STAR : Security, Trust and Assurance Registry.
* STIX : Structured Threat Information eXpression.
* STRIDE : Spoofing, Tampering, Repudiation, Information disclosure, Denial of service, Elevation of privilege.
* STS : Security Token Service.
* SWG : Secure Web Gateway.

## T
* TA : Threat Agent.
* TA : Time Advance.
* TAXII : Trusted Automated eXchange of Intelligence Information.
* TCB : Trusted Computing Base.
* TCP : Transmission Control Protocol.
* TD/CDMA : Time Division / CDMA.
* TDE : Transparent Data Encryption.
* TDEA : Transparent Data Encryption Algorithm.
* TDM : Time Division Multiplexing.
* TDMA : Time Division Multiple Access.
* TKIP : Temporal Key Integrity Protocol.
* TLD : Top Level Domain.
* TLP : Tear Line Protocol.
* TLP : Traffic Light Protocol.
* TLPT : Threat Led Penetration Testing.
* TLS : Transport Layer Security.
* TOC : Time Of Change.
* TOCTOU : Time Of Check Time Of Use.
* TOU : Time Of Use.
* TOR : The Onion Router.
* TOTP : Time-based One Time Password.
* TPM : Trusted Platform Module.
* TPRM : Third Party Risk Management.
* TRAU : Transcoding Rate and Adaptation Unit.
* TTL : Time-To-Live.
* TTP : Tactics Techniques and Procedures.

## U
* U2F : Universal Second Factor.
* UAC : User Account Contro.
* UAC : Unified Access Control.
* UAF : Universal Authentication Framework.
* UCS: Universal Character Set.
* UDP : User Datagram Protocol.
* UEBA : User and Entity Behavior Analytics.
* UIT : Union Internationale des Télécommunications.
* UMTS : Universal Mobile Telecommunication System.
* UMTS -TDD : Universal Mobile Telecommunication System Time Division Duplex.
* UNI : User to Network Interface.
* UPS : Uninterruptible Power Supply.
* URI : Uniform Resource Identifier.
* URL : Uniform Resource Locator.
* URN : Uniform Ressource Name.
* USB : Universal Serial Bus.
* USENET : UNIX user network.
* UTF: Unicode Transformation Format.
* UTM : Unified Threat Management.

## V
* VBR : Variable Bit Rate.
* VLAN : Virtual Local Area Network.
* VLR : Visitor Location Register.
* VLSM : Variable-Length Subnet Mask.
* VMK : Volume Master Key.
* VOD : Video On Demand.
* VoIP : Voice over Internet Protocol.
* VPN : Virtual Private Network.
* VPS : Virtual Private Server.
* VSAT : Very Small Aperture Terminal.
* VXLAN : Virtual Extensible Local Area Network.

## W
* W3C : World Wide Web Consortium.
* WAAP : Web Application and API Protection.
* WAAS : Wide Area Augmentation System.
* WAF : Web Application Firewall.
* WAN : Wide Area Network.
* WAP : Wireless Application Protocol.
* WCDMA : Wideband Code Division Multiple Access.
* WEP : Wired Equivalent Privacy.
* WLAN : Wireless Local Area Network.
* WORM : Write Once Read Many.
* WPA : Wi-Fi Protected Access.
* WPA2 : Wi-Fi Protected Access 2.
* WPA3 : Wi-Fi Protected Access 3.
* WPAN : Wireless Personnal Area Network.
* WPS : Wi-Fi Protected Setup.
* WRT : Work Recovery Time.
* WWW : World Wide Web.

## X
* XACML : eXtensible Access Control Markup Language.
* XDR : eXtended Detection and Response.
* XKMS : XML key management system.
* XLL : eXtensible Link Language.
* XML : eXtensible Markup Language.
* XSRF : Cross Site Request Forgery.
* XSS : Cross Site Scripting.

## Y
* YAML : Yet Another Markup Language.
* YARA : Yet Another Recursive Acronym.

## Z
* ZKF : Zero-Knowledge Proof.
* ZKF : Zero-Knowledge Protocol.
* ZT : Zero Trust.
* ZTA : Zero Trust Architecture.
* ZTNA : Zero Trust Network Architecture.