IC meaning in Maths ?

Answer: What is Index of Coincidence mean?

In cryptography, coincidence counting is the technique (invented by William F. Friedman) of putting two texts side-by-side and counting the number of times that identical letters appear in the same position in both texts. This count, either as a ratio of the total or normalized by dividing by the expected count for a random source model, is known as the index of coincidence, or IC for short.

Because letters in a natural language are not distributed evenly, the IC is higher for such texts than it would be for uniformly random text strings. What makes the IC especially useful is the fact that its value does not change if both texts are scrambled by the same single-alphabet substitution cipher, allowing a cryptanalyst to quickly detect that form of encryption.

reference

Full Form	Category
Illinois College	Academic & Science
Instructor Consent	Academic & Science
Isothermal Calorimeter	Academic & Science
Isotope Container	Academic & Science
Index Catalogue	Academic & Science
Internship Complete	Academic & Science
Intra-Cloud	Academic & Science
Identity Crisis	Academic & Science
Collector current	Academic & Science
International College	Academic & Science
Ithaca College	Academic & Science
in casu	Academic & Science
Individual Counselling	Academic & Science
Incentive Compensation	Accounts and Finance
Internal Control	Accounts and Finance
Institute of Charity	Associations & Organizations
Insolvency Certificate	Banking
Icici, LTD.	Business
Intellectual Capital	Business
Inlay Color	Business
Investment Consulting	Business
Integrated Companies	Business
International Company	Business
Internet Commerce	Business
Inflatable Curtain	Business
In Class	Business
International Classification	Business
Innovation and Creativity	Business
Income Concept	Business
Identification Card	Business
Industrial Component	Business
Ignorant Confidence	Business
International Conference	Business
Insulated Can	Business
Insulated Ceiling	Business
Information Circular	Business
Indifference Curve	Business
Information Coefficient	Business
International Community	Community
Integrated Community	Community
Intemational Committees	Community
Improvised Composed	Community
Instant Creation	Community
Impairment Combination	Computer and Networking
Industry Canada	Computer and Networking
Interexchange Carrier	Computer and Networking
Internal Code	Computer Assembly Language
Insert Character	Computer Assembly Language
Instruction Count	Computer Assembly Language
Instruction Counter	Computer Assembly Language
Ignore Case	Computer Assembly Language
If Case	Computer Assembly Language
Internal Connection	Computer Hardware
Insulation Contact	Computer Hardware
Industry Compatible	Computer Hardware
Instrument Computer	Computer Hardware
Ink Cylinder	Computer Hardware
Input Capture	Computer Hardware
Invisible Computer	Computing
Interactive Computing	Computing
In a Computer	Computing
Information Criteria	Computing
India and China	Country Specific
Independency Check	Database Management
Input Chunk	Database Management
Information Criterion	Database Management
Information and Communication	Educational Degree
Imperial College	Educational Institute
Inner Conductor	Electronics
Insulation Compatible	Electronics
Ion Chromatography	Electronics
Investment Council	Electronics
Impedance Coupled	Electronics
M3cg Intermediate Language File (modula-3)	File Type
Interface Control	General
Insulated Contact	General
Individual circuit	General
Intermediate Course	General
Ice Cool	General
In Context	General
Incomplete Charged	General
Intestitual Cystitis	General
Immediate Constituent	General
Internal Carry	General
Inspection Chamber	General
Interfaces and Controllers	General
In Custody	General
Internal Coordinates	General
Ice Coffee	General
Indenture Code	General
Integrated Circuits	General
Integrated Chip	General
Incentive Compatible	General
Illusion Castle	General
Indian And Chinese	General
Internationalized Cocconuts	General
Insane Clown	General
Ignorant Counterfeit	General
Instant Cool	General
Iron Curtain	General
Indiana Code	Governmental
Intermittent Custody	Governmental
Internal Communication	Governmental
Intentional Choice	Governmental
ICI Corporation	Governmental
Indiana County	Governmental
Inter-City	Governmental
Integrated Coach	Governmental
In Container	Governmental
Import Code	Governmental
InComing	Governmental
Identity Card	Governmental
Informed Consent	Governmental
Interstate Commerce	Governmental
Integrated Circuit	Information Technology
Iniciativa per Catalunya	International
Izquierda Comunista	International
Izquierda Unida-Iniciativa per Catalunya	International
Imum Coeli	International
InterCityzug	International
Internet Configuration	Internet
Internet Chapter	Internet
Ice Climbers	Jobs
Independent Consultant	Jobs
Independent Contractor	Jobs
Investment Counselor	Jobs
Individual Contributor	Jobs
Index of Coincidence	Maths
In (this) Case	Maths
Integrity Constraint	Maths
Intermediate Conclusion	Maths
Inner Canthus	Medical
Inner Cortex	Medical
Inorganic Carbon	Medical
Institutional Care	Medical
Instrument Calibration	Medical
Insular Carcinoma	Medical
Insular Cortex	Medical
Intensive Chemotherapy	Medical
inter cibum between meals	Medical
Intermediate Care	Medical
Intermittent Catheterisation	Medical
Intermittent Claudication	Medical
Internal Capsule	Medical
Internal Cardioversion	Medical
Internal Carotid	Medical
Internal Conversion	Medical
Interstitial Cell	Medical
Interventional Cardiology	Medical
intracanalicular	Medical
Inspiratory Capacity	Medical
intracardiac	Medical
intracerebellar	Medical
Intensive Care	Medical
intracranial	Medical
intracutaneous	Medical
Intra-Cerebral	Medical
Intraoperative Cholangiography	Medical
Intraoperative Cytology	Medical
Intravascular Coagulation	Medical
Between Meals	Medical
Invasive Cancer	Medical
Invasive Candidiasis	Medical
Invasive Carcinoma	Medical
Inhibitory Concentration	Medical
Ionisation Chamber	Medical
Ionised Calcium	Medical
Irritable Colon	Medical
Ischaemic Cardiopathy	Medical
Intra Cellular	Medical
Ischemic Colitis	Medical
ischiocavernosus	Medical
Islet Cells	Medical
Isometric Contraction	Medical
Isovolumic Contraction	Medical
Inhibition Concentration	Medical
Ischaemic Colitis	Medical
Individual Case	Medical
Incompetent Cervix	Medical
Interstitial Cystitis	Medical
Inhaled Corticosteroid	Medical
Immune Complex	Medical
Incident Commander	Medical
Irreducible Complexity	Medical
ichthyosis	Medical
Ichthyosis Congenita	Medical
Idiopathic Constipation	Medical
Immune Competent	Medical
immunochromatography	Medical
immunoconjugate	Medical
immunocytochemistry	Medical
Impedance Cardiography	Medical
Imprint Cytology	Medical
Imprinting Centre	Medical
Indeterminate Colitis	Medical
Infantile Colic	Medical
Infection Control	Medical
Infectious Colitis	Medical
Inferior Cardiac	Medical
Inferior Collicular	Medical
Inferior Colliculus	Medical
Infiltrating Carcinoma	Medical
Inflammatory Cells	Medical
Inflammatory Cytokines	Medical
Information Commissioner	Medical
Infusion Chemotherapy	Medical
Inhaled Corticosteroids	Medical
Inner Canthal	Medical
In Character	Messaging
I Can	Messaging
In Chat	Messaging
I See	Messaging
Interface Certification	Military and Defence
Inter Continental	Military and Defence
Intelligence Community	Military and Defence
Integration Contractor	Military and Defence
Internet Connection	Networking
Identification Code	Networking
Indirect Calorimetry	Physics Related
Ion-exchange Chromatography	Physics Related
Influence Curve	Physics Related
Imperial China	Regional
Illinois Central Railroad (Canadian National Railway)	Regional
Invisible Cities	Regional
Iowa City	Regional
Interactive C	Softwares
Import Coupling	Softwares
Image Converter	Softwares
Image Component	Softwares
Interior Communications	Space Science
Incremental Cost	Space Science
Information Center	Space Science
Initial Condition	Space Science
Inter-communications	Space Science
Inter-computer	Space Science
Intercomputer Communication	Space Science
Interim Change	Space Science
Internal Combustion	Space Science
Ion Chamber	Space Science
Independent Challenge	Sports
Indoor Cycling	Sports
Investment Company	Stock Exchange
Interchangeable Core	Technology
Ionization Chamber	Technology
Isolation Condenser	Technology
Intermediate Cross-connect	Telecommunication
Illinois Central Railroad	Transport & Travel
International Canoe	Transport & Travel