| 1981 | The Import/Export Dilemma. | J. Michael Nye |
| 1981 | Current Market: Products, Costs, Trends. | J. Michael Nye |
| 1981 | Subtractive Encryptors - Alternatives to the DES. | Don R. Morrison |
| 1981 | The Design and Analysis of Cryptographic Protocols. | Richard A. DeMillo, Nancy A. Lynch, Michael Merritt |
| 1981 | Digital Signature Scheme for Computer Communication Networks. | Henk Meijer, Selim G. Akl |
| 1981 | Results on Sampling-based Scrambling for Secure Speech Communication. | Lin-Shan Lee, Ger-Chih Chou |
| 1981 | Implementation of a Hybrid {RSA/DES} Key Management System. | Y. Alfred Lau, Tom McPherson |
| 1981 | Evaluating Relative Security of Commercial ComSec Devices. | Albert L. Lang, Janet T. Vasek |
| 1981 | One-way Sequence for Transaction Verification. | Alan G. Konheim |
| 1981 | Some Cryptographic Techniques for File Protection. | Stephen T. Kent |
| 1981 | Scrambling and Randomization. | Subhash C. Kak |
| 1981 | Variant of a Public Key Cryptosystem Based on Goppa Codes. | John P. Jordan |
| 1981 | Some Comments on the Knapsack Problem. | Ingemar Ingemarsson |
| 1981 | Discussion of Adleman's Subexponential Algorithm for Computing Discrete Logarithms. | Tore Herlestam |
| 1981 | A General Public Key System. | Ernst Henze |
| 1981 | High-Speed Hardware Implementation of the Knapsack Cipher. | Paul S. Henry, R. D. Nash |
| 1981 | On the Necessity of Exhaustive Search for System-Invariant Cryptanalysis. | Martin E. Hellman, Ehud D. Karnin, Justin M. Reyneri |
| 1981 | Towards a Design Procedure for Cryptosecure Substitution Boxes. | J. A. Gordon |
| 1981 | Limitations on the Use of Encryption to Enforce Mandatory Security. | Morrie Gasser |
| 1981 | Protocol for Signing Contracts. | Shimon Even |
| 1981 | National Security and Commercial Security: Division of Responsibility. | Whitfield Diffie, Melville Klein, Michael L. Dertouzos, Andrew Gleason, Dean Smith |
| 1981 | Cryptography, the Next Two Decades. | Whitfield Diffie |
| 1981 | Some Regular Properties of the DES. | Donald W. Davies |
| 1981 | Verification by Anonymous Monitors. | David Chaum |
| 1981 | An Optimally Secure Relativized Cryptosystem. | Gilles Brassard |