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  1. Caesar cipher: Encode and decode online - cryptii

    Caesar cipher: Encode and decode online Method in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. The method is named after Julius Caesar, …

  2. Decrypt a Message - Cipher Identifier - Online Code Recognizer

    Tool to identify/recognize the type of encryption/encoding applied to a message (more 200 ciphers/codes are detectable). Cipher identifier to quickly decrypt/decode any text.

  3. Cipher - Wikipedia

    In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption —a series of well-defined steps that can be followed as a procedure.

  4. CIPHER Definition & Meaning - Merriam-Webster

    Noun a cipher that can't be decoded She was nothing more than a cipher. Verb were surprised by how much we had spent on the cruise after we had ciphered out the grand total

  5. Cipher Identifier (interactive tool) | Boxentriq

    Stuck with a cipher or secret code? This free AI tool will help you identify the type of encryption and guide you how to decode and solve it.

  6. Types of Ciphers: A Complete Guide to Early and Modern Codes

    Feb 26, 2025 · Over thousands of years, ciphers have evolved from coded messages into the creative arts and became part of a movement called Cypherpunk, at the heart of cryptocurrency, bitcoin and …

  7. What is Cipher? - GeeksforGeeks

    Jul 23, 2025 · Cipher is used in securing financial transactions, protecting information, and maintaining the confidentiality of communication among many others. This article focuses on the concept of …

  8. What Is a Cipher? Definition, Purpose, and Types - NinjaOne

    Aug 13, 2025 · Cipher Definition: A cipher is an encryption algorithm used to convert plaintext into unreadable ciphertext and vice versa, forming the foundation of data security and cryptographic …

  9. Cipher - Glossary | MDN

    Jul 11, 2025 · In cryptography, a cipher is an algorithm that can encrypt plaintext to make it unreadable, and to decrypt the encoded data back to plaintext again.

  10. CIPHER | definition in the Cambridge English Dictionary

    CIPHER meaning: 1. a system of writing that prevents most people from understanding the message: 2. a person or…. Learn more.