Store Now, Decrypt Later (SNDL)
Store Now, Decrypt Later (SNDL) is a cryptographic technique that involves storing encrypted data for an extended period before decrypting it[5]. It is also known as Harvest Now, Decrypt Later (HNDL) or retrospective decryption[1][4]. The technique relies on the acquisition and long-term storage of currently unreadable encrypted data awaiting possible breakthroughs in decryption technology that would render it readable in the future[4]. The most common concern is the prospect of developments in quantum cryptography which would allow current strong encryption algorithms to be broken at some time in the future, making it possible to decrypt any stored material that had been encrypted using those algorithms[4]. Cybersecurity experts have warned that hackers are stealing data now to decrypt it in the future, as quantum computing could render modern encryption methods obsolete[2][3]. To prepare for the arrival of quantum computers, security measures are being taken, and the US National Institute of Standards and Technology (NIST) has selected a group of encryption algorithms that could become the new cryptographic standard in a post-quantum world[2]. The urgency to update modern encryption methods is high, and academia and industry need to ensure that quantum-resistant encryption is a reality before quantum computers change the digital world as we know it[2][6].
Citations: [1] https://thequantuminsider.com/2023/02/07/guest-post-harvest-now-decrypt-later-the-truth-behind-this-common-quantum-theory/ [2] https://www.siliconrepublic.com/enterprise/quantum-apocalypse-store-now-decrypt-later-encryption [3] https://venafi.com/blog/store-now-decrypt-later-prepare-now-for-quantum-computing/ [4] https://en.wikipedia.org/wiki/Harvest_now,_decrypt_later [5] https://www.linkedin.com/pulse/risks-store-now-decrypt-later-safeguarding-data-uncertain-haroon [6] https://www.entrust.com/solutions/post-quantum-cryptography