Cisco CloudCenter: Get the Hybrid IT Advantage

Vigenere Cipher

Definition - What does Vigenere Cipher mean?

The Vigenere cipher is a plain-text form of encoding that uses alphabetical substitution to encode text. This ancient form of cryptography dates back to the 1400s and was documented in the works of famous writers of the era such as Trithemius.

Techopedia explains Vigenere Cipher

The Vigenere cipher, like other contemporary cryptographic ciphers, uses something called a tabula recta, a grid of alphabetic characters where encoders can shift lines for alphabetic substitution. This basic strategy is also part of the Trithemius cipher, and the Caesar cipher, named after Julius Caesar.

Instead of doing a consistent shift alphabetically, the Vigenere shifts letters according to a repeating keyword, which serves to make the encryption more complex and more difficult to decode.

As a "transposition" code or a code involving the substitution of alphabetic letters, the Vigenere cipher represented an improvement from codes that simply shifted letters consistently. These primitive codes were easy to break through processes like letter frequency. Still, even the Vigenere code is not considered a very strong code, and is easily broken with modern tools.

Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.