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Exploring Common Database Encryption Techniques

kokou adzo



Close Up Photo of Programming of Codes

The security of your bank account is a lot like guarding a treasure chest. You don’t just leave it open for anyone to peek inside. Instead, you secure it with a hefty lock and protect it with your life. Well, not really, but you get the picture.

Similar to this, your data, valuable as it is, needs protection. Databases, much like a digital bank account, keep our important data safe. And to keep prying eyes off, it needs to be encrypted. But how do we do this?  In this article, we explore data encryption, analyze database encryption techniques, and explain how a database monitoring solution can benefit you.

 What is Database Encryption?

In 2023, the cost of data breaches has risen, with the global average cost per breach reaching a staggering 4.45 million U.S. dollars, a 3% increase from the previous year. This trend shows the need for secure database management.

Database encryption involves applying cryptographic techniques to transform readable data, known as plaintext, into an encoded version. Only those with access to the decryption key can convert the data back to its original form. It’s the equivalent of converting data into Morse code. This process safeguards your information and makes sure that even if someone accesses your database without permission, they won’t be able to make sense of the data they find.

Database Encryption Techniques

There are many ways to encrypt your database. These include column encryption, field encryption, and transparent encryption. Each method has advantages and disadvantages, and your choice will depend on your specific needs and circumstances.

  • Column encryption, as the name suggests, involves encrypting individual columns in a database table. This means that each piece of data is converted into unreadable text. The advantage is that it can provide high levels of security, as each column can be encrypted using a different key.

On the downside, implementing column encryption can be complicated and can also impact database performance. This is because every time data is read from or written to the encrypted column, it needs to be decrypted or encrypted, slowing down database operations.

  • Field encryption, another popular database encryption technique, encrypts individual fields within a database record. Unlike other methods that encrypt the entire database, field encryption encrypts individual data units, giving you more granular protection. This approach benefits those who only need to encrypt specific data fields. By regulating who can access specific data pieces, it can offer better flexibility in terms of access control.

However, field encryption also has its drawbacks. First, this process is rather slow. Encryption and decryption of individual fields is resource-intensive and can lead to slower database performance. This is a trade-off to consider when opting for this method of database security.

  • Transparent encryption is less intrusive compared to field encryption. It operates at the file system level, encrypts data as it’s written to the database, and decrypts it when read, all without user intervention. This reduces the complexity of managing keys during the encryption process, making this encryption method simple and easy to use.

The tradeoff, however, is that it’s less secure than column or field encryption because it doesn’t protect data in memory or transit between the database and the application. However, transparent encryption can be a good choice for scenarios where ease of use and performance are more important than maximum security.

Securing Corporate Databases

Securing corporate databases is a non-negotiable aspect for many modern businesses, and one way of achieving this is through database monitoring solutions. These tools provide real-time visibility into all database activities, identify potential threats, and help prevent data breaches. They are designed to spot suspicious activities, alert stakeholders, and sometimes take corrective action to mitigate threats.

Encryption algorithms, like Triple DES, RSA, Blowfish, Twofish, and AES-256, are vital for database security. These algorithms provide solid protection, turning data into an unreadable format that can only be deciphered using a decryption key. Triple DES and AES-256 are recommended for their high level of security, while RSA is favored for its public key encryption. Blowfish and Twofish offer fast, efficient encryption, making them suitable for applications where speed is essential.

Database encryption can be performed at various levels to suit different needs and circumstances. Application-level encryption provides security from the point of data entry, while database encryption secures data at rest within the database itself. File system level encryption offers another layer of protection, encrypting data at the file system level. Lastly, full disk encryption ensures that all data on a hard drive is encrypted, providing an extra layer of security and making it virtually impossible for unauthorized users to access sensitive information.

Other benefits of incorporating a database monitoring solution into your digital infrastructure include:

  • Performance Tuning: Database monitoring solutions can be used to optimize the performance of a database. They identify bottlenecks, inefficient queries, and other performance issues, providing insights that can be used to improve overall database efficiency.
  • Capacity Planning: These tools can track database growth patterns and predict future capacity needs. This helps organizations plan for resource allocation and avoid potential capacity-related issues in the future.
  • Automated Alerts: Database monitoring tools can be configured to send automated alerts in case of potential issues. This feature ensures that problems are addressed promptly, reducing the impact on business operations.
  • Fault Detection and Diagnosis: These tools can identify system failures or malfunctions, helping to minimize downtime. They provide detailed diagnostic information, enabling quicker problem resolution.

Choosing the correct database encryption technique for your business is a crucial decision. It’s not just about finding the most secure method but also about finding a way that fits your business processes and technical capabilities.

Consider the sensitivity of your data, the influence of alternative encryption approaches on performance, and the complexity of implementing and managing them. Remember that the goal is not only to safeguard your data, but to do it in a way that does not disrupt your business operations or place undue strain on your IT team.

In conclusion, database encryption is a powerful tool for protecting your data from unauthorized access. By understanding the different encryption techniques and how they fit your business needs, you can make an informed choice that will help ensure the security of your corporate databases.

Kokou Adzo is the editor and author of He is passionate about business and tech, and brings you the latest Startup news and information. He graduated from university of Siena (Italy) and Rennes (France) in Communications and Political Science with a Master's Degree. He manages the editorial operations at

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