Corporate Shift Away from PPAP Accelerates - HENNGE One's De-PPAP Feature Surpasses 350,000 User Companies in 2 Years -2023.10.26


HENNGE K.K. (headquarters: Shibuya, Tokyo, Representative Director, Chief Executive Officer: Kazuhiro Ogura, “HENNGE”) is pleased to announce that the adoption of "HENNGE Secure Download," a de-PPAP (*1) solution for secure file transmission via e-mail, has exceeded 350,000 user companies (*2) approximately two years after its introduction. Furthermore, the number of e-mails with attachments sent by HENNGE One users using PPAP has decreased by approximately 40% over the past two years, indicating a growing trend among domestic companies to abandon PPAP practices.

■ About Surpassing 350,000 User Companies
PPAP, widely adopted in Japan as a method of sending password-protected ZIP files via e-mail with the password sent separately, has faced increasing scrutiny in recent years due to concerns about its security and convenience. In response, many companies have been transitioning to alternative methods, commonly called "de-PPAP."

In October 2021, HENNGE introduced the de-PPAP solution, "HENNGE Secure Download," as a feature of its cloud security service, "HENNGE One." The solution has been widely adopted by listed companies, various industries, and local governments due to its simple operation and high security. By January 2023, the number of user companies had surpassed 200,000 (*3). The announcement reveals that within approximately two years of its launch, HENNGE Secure Download is now being utilized by over 350,000 user companies.

■ Corporate Transition Away from PPAP
To assess the shift away from PPAP among user companies, HENNGE conducted a survey comparing the methods of sending e-mails with file attachments by HENNGE One users shortly after the introduction of HENNGE Secure Download in October 2021 and two years later in October 2023 (*4). The results indicate a reduction of approximately 40% in the number of e-mails sent per week via PPAP over the two years (from 3.21 million to 1.96 million).


In addition, HENNGE also counted the means of sending e-mails with attachments sent by HENNGE One users on a weekly basis. As a result, the number of e-mails sent by HENNGE Secure Download during the week of October 1 to 7, 2023, reached 2.01 million, surpassing the number of e-mails sent by PPAP (1.96 million) for the first time during the same period. (*5).


These findings highlight the increasing momentum among Japanese companies to balance the safety and convenience of file transmission, leading to a significant shift towards alternative methods like "HENNGE Secure Download."

HENNGE remains committed to promoting secure file transfers through the continued provision of "HENNGE Secure Download" and "HENNGE One," contributing to enhancing both convenience and security for businesses.

*1. PPAP is an e-mail transmission method in which a ZIP file with a password is sent as an attachment to an e-mail, and the Password is sent through the same route. Its security and convenience have recently been questioned, and many companies are moving toward de-PPAP. Abbreviations for P - Zip-encrypted file with Password is sent; P - Password is sent separately, A - Encryption (“angouka” in Japanese”); P - Protocol
*2: Our estimate is based on the number of unique domains, excluding those of well-known free e-mail services/ISPs, etc., out of the number of e-mail address domains for which recipients who received an attachment file via HENNGE Secure Download authenticated their identity when downloading the file (cumulative total). (Cumulative total). The graph at the top of this press release includes domains of well-known free e-mail services/ISPs.
*3 "52% of Companies Introduced File Attachment Download Service as an Alternative to “PPAP” ~ 200,000 Companies is Now Utilizing HENNGE One’s Non-PPAP Function〜"
*4: HENNGE One user sent e-mails with file attachments, and we compiled the data weekly. In the graph of "The number of e-mails with file attachments sent by HENNGE One users using PPAP," data from October 3 (Sun.) to 9 (Sat.), 2021, and October 1 (Sun.) to 7 (Sat.), 2023 were extracted for comparison.
*5. In the graph of "Means of e-mails with attachments sent by HENNGE One users," extreme increases or decreases in the number of e-mails sent due to long vacations and other reasons are omitted.

■ About HENNGE Secure Download
HENNGE Secure Download was released as a de-PPAP feature of HENNGE One, a cloud security service by HENNGE, in October 2021. By simply sending the file as an attachment to the email like usual, the attached file will automatically be uploaded to cloud storage. The recipient will then receive the content of the email, along with a PDF containing the URL to download the attachment file. Once the recipient requests authentication of their email address, an authentication code will be sent separately through another channel. Since the download URL is issued to each recipient, only the recipient can authenticate and download the file. In addition, in case an incorrect file is attached by mistake, the URL can be disabled even after transmission.

<About HENNGE Secure Download>

about hsd

■ About HENNGE One
HENNGE One is a cloud security service that supports the “safety” and “convenience” of the working environment. The “IdP Edition”, one of the two main functions of HENNGE One, integrates ID/passwords for multiple cloud services, such as Microsoft 365, Google Workspace, Box, etc., and provides protection against unauthorized access through access control. Additionally, the “E-Mail Security Edition” includes a wide range of e-mail security functions, including non-PPAP, targeted attack protection, and e-mail error/audit support. With a variety of functions, we support the use of cloud services for enterprises and continue our corporate philosophy of "Liberation of Technology".

■ About HENNGE K.K.
HENNGE K.K. was established in November 1996. It is a SaaS company, guided by the philosophy of "liberation of technology to change the world" and it develops and sells unique services that bridge the gap between technology and reality. HENNGE provides "HENNGE One", a one-stop cloud security service enabling consolidated IDs and passwords management of multiple cloud services, "Customers Mail Cloud" which is a cloud email distribution service. Since October 2019, HENNGE had been listed on the Tokyo Stock Exchange (TSE), Mothers, and then, a transition was made to the TSE Growth in April, 2022.
The company name "HENNGE" originated from the Japanese character for transformation, 'HENNKA' and 'CHALLENGE', which represents its commitment to keep challenging against every change we encounter.

Company name: HENNGE K.K. (securities code: 4475)
Address: Daiwa Shibuya Square, 16-28 Nanpeidaicho, Shibuya City, Tokyo
Representative: Kazuhiro Ogura (Representative Director, Chief Executive Officer)

■ Contact information for inquiries regarding this press
Corporate Communication Division
TEL: 03-6415-3660
Person in charge: Yano

*The names of companies, products and services mentioned in this press are trademarks or registered trademarks of HENNGE.K.K. or other related organizations.

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