What is Encryption?
Encryption means converting information into a coded form to prevent unauthorized access. For a layperson, this means making information unreadable to anyone without the correct key. For an expert, it involves mathematical algorithms and key management to protect data. According to the Swedish Academy Glossary (SAOL), encryption is defined as “transmitting in a secret language.”
Why Did Encryption Emerge?
Encryption dates back to ancient times, when the Roman emperor Julius Caesar used a simple cipher method to send secret messages. In the 20th century, advanced cryptographic techniques were developed, particularly during World War II, when the Enigma machine played a crucial role in signals intelligence. Today, encryption is a cornerstone of digital communication and cybersecurity.
When is Encryption Used?
Encryption is used daily in digital communication and data protection. Examples include:
- Securing emails and messages (e.g., end-to-end encryption in chat apps).
- Secure file storage and cloud services.
- Payments and financial transactions.
- Encrypted communications in defense and government sectors.
How Does Encryption Work?
When someone writes a message, it is encrypted using an algorithm that transforms it into an unreadable, coded format. The message is then transmitted over the internet in this encrypted form. When the encrypted message reaches the recipient, a decryption key is used to convert it back into readable text. This ensures that unauthorized parties cannot access the content during transmission.
The same principle applies to files stored on a USB drive or in cloud storage: they can be encrypted before being saved and made readable only with the correct key. This protects sensitive data from unauthorized access, even if the files fall into the wrong hands.
When Is Encryption Unnecessary?
In some cases, encryption may be unnecessary or even counterproductive:
- For public content that does not contain sensitive data.
- In systems with low confidentiality requirements and high performance demands.
- When compliance or administrative requirements make it difficult to manage encrypted data.
Who Benefits from Encryption?
Everyone handling information can benefit from encryption, but it is especially critical for:
- Government agencies and the defense sector protecting national interests.
- Businesses safeguarding trade secrets and customer data.
- Individuals who value their digital privacy.
Example of Encryption in a link22 Product
Scenario: Secure remote access with Secure Access Client
When a user connects remotely to a secure domain via the Secure Access Client, a secure connection is established through an encrypted VPN tunnel. This process involves the following steps:
- Authentication – The user is verified through multi-factor authentication (MFA), often combining a smart card with a password.
- Encrypted connection – A TLS/SSL-based encryption is used to establish a protected channel between the client and the secure domain, preventing third-party interception or manipulation of data.
- Data protection – All traffic between the user and the secure domain is encrypted during the session. This ensures sensitive data remains confidential.
Thanks to this process, users can work with sensitive information in secure domains without risking data leakage.
Want to Learn More?
Encryption is a fundamental part of cybersecurity and a key component in link22’s products. By implementing our security solutions, your organization can protect sensitive information and ensure robust data protection. Want to see our solutions in action? Book a demo and let us show you how we can strengthen your IT security.
