RSAC™ Conference Lifetime Achievement Award Presentation

A Lifetime of Discovery: Burt Kaliski Receives RSAC's Highest Honor

Speakers: Ron Rivest (MIT), Jim Bidzos (Verisign), Burt Kaliski (Verisign)

Conference: RSA Conference 2025 — April 28–May 1, 2025, Moscone Center, San Francisco

YouTube: https://www.youtube.com/watch?v=sEUXtyqOgO4

Reading time: ~5 min

TL;DR

RSA Conference 2025 honored Dr. Burton Kaliski, Senior Vice President and CTO of Verisign, with its Lifetime Achievement Award for more than four decades of foundational contributions to cryptography. From co-creating the Public-Key Cryptography Standards (PKCS) to pioneering post-quantum research, Kaliski's work undergirds the digital privacy infrastructure the world depends on today. In his acceptance, Kaliski distilled a career of discovery into a single word: hope.

Introduction

Few awards in cybersecurity carry the weight of the RSAC Lifetime Achievement Award. Past recipients include the inventors of the foundational algorithms that bear their names — a lineage that makes the honor one of the field's highest distinctions. At RSA Conference 2025, that recognition went to Dr. Burton Kaliski, a cryptographer whose career spans the entire modern history of public-key cryptography, from its earliest commercialization through the current race to defend against quantum adversaries.

The presentation was made by two figures who have known Kaliski longest: MIT Institute Professor Ron Rivest — the "R" in RSA — and Jim Bidzos, Chairman and CEO of Verisign, who hired Kaliski as the company's seventh employee more than three decades ago. Their remarks traced not just a career, but a discipline.

The Making of a Cryptographer

▶ Watch: Ron Rivest's introduction (0:00)

Rivest first encountered Kaliski in 1983, when the future CTO arrived at MIT to pursue his bachelor's, master's, and doctoral degrees under Rivest's supervision, finishing his PhD in 1988. Even as a graduate student, Kaliski's instinct for bridging theory and practice was evident. He was selected as General Chair of Crypto '91 and Program Chair of Crypto '97, early markers of standing in a tight-knit community.

His most-cited paper — Proof of Retrievability for Large Files, co-authored with Ari Juels — introduced a cryptographic method enabling a server to prove it actually holds a specific large file without transmitting it in full, a concept that has grown in relevance as cloud storage has become ubiquitous. Rivest also highlighted Kaliski's more recent work: methods for advertising quantum-safe key agreement capabilities, and efficient multi-message signing schemes using Merkle trees and hash functions — directly relevant to the post-quantum cryptography transition now underway globally.

Employee Number Seven and the Birth of PKCS

▶ Watch: Jim Bidzos on hiring Kaliski (2:00)

Jim Bidzos offered a more intimate account. In September 1989, he hired Kaliski as RSA Data Security's seventh employee — its first full-time cryptographer. Kaliski's timing was critical: he arrived just as the internet's foundational trust infrastructure needed to be built from scratch. Within months, he was supporting privacy-enhanced mail standards at the IETF and helping RSA's early customers — the leading technology companies of the era — integrate cryptography into their products.

By 1991, Kaliski was leading the effort to create what became PKCS, the Public-Key Cryptography Standards, a suite of specifications developed with Novell, Lotus, Apple, and Microsoft as participants. Those specifications, Bidzos noted, "are widely used today," an understatement that understates how thoroughly PKCS underpins the modern web's certificate and encryption ecosystem. That same year, Kaliski was a panelist at the very first RSA Conference, a gathering that would eventually become the world's largest cybersecurity event.

At just 28 years old in 1992, Kaliski became the founding Chief Scientist of RSA Laboratories, leading a research group that included Rivest, Whitfield Diffie, Martin Hellman, and Taher Elgamal — every one of them a future RSAC Lifetime Achievement Award recipient in their own right.

A Career Defined by Standards and Staying Power

▶ Watch: Bidzos on RSA Labs and lifelong commitment (4:00)

What distinguishes Kaliski from many research luminaries is continuity. He has never left the professional family he helped build. After RSA Laboratories, he moved to Verisign as CTO, where Bidzos now serves as CEO and Rivest as an advisor — a decades-long collaboration that has simply changed addresses.

Bidzos captured the scope plainly: "Many millions around the world can thank Dr. Burt Kaliski for his contributions to the digital privacy they enjoy." That privacy rests on standards — TLS, certificate chains, key exchange protocols — that Kaliski's hands helped shape at their origin.

"Hope" — The Word Behind the Work

▶ Watch: Kaliski's acceptance speech (5:30)

In his acceptance remarks, Kaliski set aside résumé recitation in favor of something more personal. He thanked an extensive community — late mentors, executive leaders, laboratory colleagues, and above all his family, including his wife Michelle, their son Steve and daughter Jesse, and their grandson Ari.

Then he turned to the question of what sustains a life in cryptography:

"My friends, do you recall the feeling you had when you first encountered an amazing idea? I still remember when I learned about RSA, this way to encrypt with a key that you couldn't decrypt with. Could this be possible?"

His answer to what has driven him was a single word: hope.

"Hope that if there is one idea that can help the world, then there must be more, that we are not limited by the past. We can build a better future together, and that if we pursue these gifts with humility, then we may indeed also build a lifetime of achievement in the things that matter."

Notable Quotes

"Burt's work and his research are present throughout today's digital world. Many millions around the world can thank Dr. Burt Kaliski for his contributions to the digital privacy they enjoy."

— Jim Bidzos (4:00)

"He has always been interested in the relationship between theory and practice, and in seeing that theoretical advances have practical impact through the development of supportive technology and standards."

— Ron Rivest (2:00)

"Hope that if there is one idea that can help the world, then there must be more, that we are not limited by the past."

— Burt Kaliski (6:00)

Key Takeaways

• Kaliski joined RSA Data Security in 1989 as employee number seven and its first full-time cryptographer, then founded RSA Laboratories at age 28 — a formative institution for an entire generation of cryptographers.
• The Public-Key Cryptography Standards (PKCS), which he led from 1991 with partners including Apple, Microsoft, Novell, and Lotus, remain foundational to modern internet security infrastructure.
• His most-cited research — Proof of Retrievability — addressed a problem of proving data custody, a challenge that has only grown more important in the cloud era.
• Kaliski's current work in post-quantum cryptography, including quantum-safe key agreement advertisement and Merkle-tree-based signing, positions him at the frontier of the field's next major transition.
• His career illustrates a model for the discipline: sustained engagement across theory, standards, and practice, sustained across more than four decades without leaving the professional community he helped create.