##  [Information-Theoretic Security](/information-theoretic-security) 

  ##  [Information-Theoretic Security](https://information.quantumdictionary.io/information-theoretic-security-0) 

  

 [![Information & Communication Dictionary](/sites/default/files/styles/large/public/2026-01/Information%20%26%20Communication.png.webp?itok=g4emS-T7)](/topic-specific-dictionaries/information-communication)



**Information & Communication Dictionary**

 







 

 

 

 



 

 

 

 

Definition

Security guarantees about confidentiality or secrecy derived from information measures and coding constructions rather than computational hardness assumptions: statements that an adversary’s information about a message (e.g., mutual information or equivocation) can be made arbitrarily small under specified channel, key, or coding resource constraints.